MIT grad shows how to use the elimination method to solve a system of linear equations (aka. simultaneous equations). To skip ahead: 1) For a BASIC example where terms cancel right away when you add the equations, skip to 0:25. 2) For an example in which you have to MULTIPLY ONE EQUATION by a number before adding the equations, skip to time 6:26. 3) For an example in which you have to MULTIPLY BOTH EQUATIONS by numbers before adding, skip to 12:12. P.S.) For HOW TO SUBTRACT equations instead of adding them, if you'd rather do that, skip to 18:00. Nancy formerly of MathBFF explains the steps.

Follow me on Instagram! https://instagram.com/mathnancy

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For how to solve a system of linear equations by the SUBSTITUTION METHOD, jump to: https://youtu.be/YriMMWbndn0

What does it mean to solve a system of equations using the elimination method? It means to solve for the x and y values that make both equations true, using the elimination method. Elimination is just one way of solving (substitution is another way) and is sometimes called linear combination. Here's how:

1) BASIC ELIMINATION: First, make sure the equations are ordered in the same way, with their like terms lined up vertically. Then, try adding the equations (vertically) to make a new equation. If a term in the first equation has the same number coefficient but opposite sign (like 5y and -5y), then adding the equations will mean that those terms cancel. Since those terms disappear (in the example, 5y and -5y), there is just the variable x left in the equation so you can solve for x. Once you solve for x, you can take that number and plug it in for x in either of the original equations in the system, to solve for the other variable, y. The (x,y) pair is your solution.

2) MULTIPLY ONE EQUATION BEFORE ADDING: Sometimes terms don't immediately cancel when you add the two equations. What do you do then? Try multiplying one of the equations by a number (both the left and right sides) to make either the x terms or y terms have similar coefficients (but opposite sign), like positive 4x and negative 4x. Then add the two equations (the new version) and follow the same steps as in the first example.

3) MULTIPLY BOTH EQUATIONS BEFORE ADDING: If it does not help to just multiply one equation by a number, you may need to multiply both equations, separately, by numbers. If you check to see whether you can just multiply one equation by a number and add opposite terms/eliminate a variable, and it is not possible, then aim for an LCM, or least common multiple, by multiplying each equation by a different number, and then adding the equations.

P.S.) YES, YOU CAN SUBTRACT INSTEAD (if you want): If you have a system that has the exact same x terms or exact same y terms in both equations, if you prefer, you can just subtract the equations. Alternatively, if you still wanted to add the equations, you could just multiply one of the equations by -1 first and then add the equations and solve normally.

IMPORTANT: If you get something like 0 = 0 or 8 = 8, or something like 1 = 2 or 0 = 21 when you are following these steps and trying to solve, then you have probably found a special case. If you get something TRUE like 0 = 0 (a number equals the same number), then there are an infinite number of solutions to the system, and you can just write "infinitely-many solutions". If instead you get something FALSE like 0 = 21, then there is no solution (inconsistent system), and you can write "no solution".

For more of my math videos, check out: http://nancypi.com

We’re being netflixed and we love it. It’s like you just dropped a season on us today. Thank you!

“You don’t have to like math but you can like my video!”-🤣😂🤣😂 & for the record I did not like it, I loved it!!❤️

By ghohigiguvugivivuc7fuf iu f7f iu fuf iu

@tita tita true

@tita tita Bruh

Oy.

Great to see you back in action!

Omg I just noticed all of your new posts !! I’m so happy to see your videos again ❤️❤️❤️

thank you 💚💚💚

NancyPi thanks for posting This. I have a midterm coming up on Wednesday and some of the questions we have to solve with the elimination method. I struggled with this until now.

i would make the computer do it lol

We’ve missed you Nancy. I have a Maths exam tomorrow. I’m actually looking forward to it.

Mr.Mister how’d it go?

@Craig Richardson legend says he is still looking forward for the exam

i passed my last math class thanks to you thank you so much. please keep the vids coming.

I should be studying vector calculus but I’m instead watching this :p

Mey I ask you vector is pubg M right

Nancy notice me pls

Hey evil 😈stay out of trouble!

NancyPi NANCY THANK YOU

HAHAHAHA

You are a great teacher.

Can you do polars ?

She’s is baaaaaaaack

She’s not black.

@EYE BRO ENDS Man it’s magnifying glass, not magnifineglass LMAO

Hope some linear algebra is coming soon.

I cannot believe it’s finally happened, and these videos feel just the same as the classic Nancy mthbff. So great to have you back, and I’m glad things have become better for you on the other side to have enabled your return. Wishing you the best – gratefully, a mentee.

*SAT PROBLEM TYPES VIDEO SERIES PLEASEE!*

Na sat is for old people 😅😜

do you have a video solving a system of equations using a matrix? (i kinda need it for my differential equations class T^T )

please upload topics on differential equations.. include variable separable,homogeneous, exact,linear….i am waiting for this such topics since year

topics on ordinary differential eq and partial differential eq too.. earlier i had subscribe on mathh but since there are not such topics.I hope you will upload soon…thanks

HELLOOOOOOO

It’s been a while Nancy. you have been quite busy with your kpop group but now im glad youre back 🙂

Meteora Lord 😂😂

Kpop group?!

Hate maths…but Wonder Woman does makes it interesting…nice change from my normal stuff.

2:53 : Why only one equal sign? We’re adding up two of them.

Sorry, just kidding!

Awesome! Thanks, Nancy!!

save me

actually save me

help

im not kidding

im gonna die

You are a savior. Your “Hey, it’s okay!” demeanor and explanations of how it’s okay to do equations differently have completely made me remember how to do things; you are carrying me through college 🙂 thank you. You deserve more outreach!

love you from afghanistan!

This video makes it all make sense. You didn’t just answer the question you explained all the possibilities. Thank you Thank you Thank you.

You are a wonderful teacher.

Such a beautiful and calming math teacher! Thank you so much for helping! 💝

Нормуль объяснила.

Do you play minecraft?

Is this the fastest way if you’re doing the SAT?

I ❤️ you💋

Your teaching is awesome

You are back after a long time my big sister

29 July anyone……

Do integration videos more

Every your videos are perfect for me I learned from you stuff that they don’t teach us in high schools (integration )

in the equation 15:26 if five was negative would it make a difference?

Great !!

madam I tmhave one questions in third equation why u exchange 4y and 3x

thank you your teaching is very thorough

Am hi Nancy why is at 8:22 you multiplied the second equation by 4 instead of negative 4?

Thanks for the math and all but is she seriously writing backwards with her left hand? If she is…. she’s awesome

Your the real deal. I have viewed many many videos but with you I understand. I have so much difficulty with math. Thank you for your patience & going slow so I can grasp the concept. Most teachers go very fast then move on & Im left behind. You are my math hero. Good job to you. 👏🏻👏🏻👏🏻👏🏻👏🏻

I don’t have to like math, but I can like your videos and I can like you. You’re delightful, even when I’m baffled. My fault, not yours.

im so confused, how is she writing on the air (maybe its like lamination stuff lol)

Thank you for the explanation it helped me a lot

Nancy is awesome, you make algebra easy to understand. Glad to see you back.

wow this is super good keep up the good work

How do you know what to multiply the equation by? Send help plz.

I really like your videos

Nice

how about something like this 2x+4y=3 x-3y=12

Thank you! So much better than my professor explaining it!

Thank u because the way my teacher taught the multiplication part pissed me off

very amazing teacher thank you soooo much

send reinforcements oh yheah yeah

Thank you so much! This really helped me with my finite hw I was stressing so much and getting confused by the no solution equations, I thought I was doing it wrong the whole time.

wowwwwww learnt more in 20 mins with you than my last two years of school!!!!!!!!THANK YOUUUUUU

Helpful during the lockdown

@Kenneth Zumwalt Since you are using YouTube I suppose you can google the word learnt….and probably add it to your vocabulary😬😬😬

@Kenneth Zumwalt “lol”

Nice video

#EducationNext

Honestly

Thank God I found this video! You literally saved my life!

wait she has to write backwards because she is using the glass???

Rayed it’s reversed

Thank you for the explanation, I really appreciate the clear and patient explanation. Trying to build my Algebra foundation, PEACE!!!

I’m still trying to figure out how she writes on the other side

If you look closely at a photo of Nancy (other than in a video) the explanation should be there.

It’s mirrored

So am i

thanks awesome video very clear

thank you so much! you really helped me to pass the long quiz

ayy army

How does she write on screen backwards??

Maybe she’s writing on a mirror .

Hold the pen backwards 👈

Its physics

She’s a Wizardess

W M Wizardess

thaaaaankkkkk yyyyyoooouuu ssoooo much !!! 😙😚😍

it helps a lot 😙

Hi i want one question

What you want I’ll tell her for ya

How to make vedio?

I want made vedios tutorials. In front of camera my body and my lecture. Plz explain me. Your work is brilliant

Ahsan Ali like a YouTube video? If so all you gotta do is find the camera button in the top of the home page and bam

Written use board but what you use?

can u do this elimination method

wow

Why did the -9y become +9y ?

Thanks helping me understand elimination helped a lot continue the videos thx!!!

oh yeah yaeh

Oh come on u made it easy for yourself

Hi Nanacy! I really appreciate, inform, entertain and educate from your teaching and your intelligent method of teaching.

Only 5 minutes and I can see easily how to do this properly. My teacher always forgets something and then we have to go back and change it then the correct part of what I learned is only partially correct. And relearn the whole problem. After that when I know part of what I’ve done is correct another student has to tell her that she’s wrong again about something they noticed. This causes so much doubt in the student’s skill they already had. This has been happening daily since August. I can’t think of one day this teacher didn’t make a big teaching mistake…even on quizzes and chapter test. 😞 Seems like she’s only doing the problems for herself and not teaching.

yea same broski,

OMG that’s exactly my teacher atm! except worse, since she cries in class when no one is listening. like, im not even lying, shes crying and thats kind of a distraction to the students as well- like, how did this girl get to have her teacher’s license this way? smh

in that case, your teacher needs a check up on her job. Seriously.

@華子 that’s unprofessional of her but have some sympathy judging how teachers get treated

Thats a horrible teacher then

THANK YOU!!!!

X -Y equals -3

X multiplies by Y equals 20

how do i do this?

Dutch van de Linde the fuck how yo ass got internet in 1899

the hot teacher

Thanks for adding on 4 marks to tomorrow’s exam!!

Gonna be mad if it doesn’t show now.

did it??

– take away a – is a plus

It’s a pain in the ass. That’s what it is.

Please tell me this isn’t all on the Foundation GCSE paper?

you are excellent

Hi 👋 Nancy glad to be one of your sub and appreciate your teaching I would like to see Sequence and Series this topic is really bothering me thanks 🙏🏼

wow i love the way u explain…cute tho

nancy please solve system of linear equations using “gauss jordan” method..and also tell simple tips and tricks ..i am waiting for you to upload the video

on step 3 example problem, you lost me when you rewrote the problem and swap the the 4y+3x, to 3x +4y why did you do that? and how was that allowed

She make this so easy

Thank you so much. I had a hard time understanding with the way my teacher taught it. But this vid really helped

How we will know that when we will put + or _ you put + 4x_8y=12

How did you get 5x+9y=-6 in the second step when lining them up????????

very good

mam please tell me cross multiplication method

Thank u so so much u just saved me

WTH is this shit am gonna fail

Your the best thank you

you are soooo hot

Justin Gilfert lol boi your forehead be looking like the damn WiFi signal 😂

@JayDog 1407 LMFAOOOOOOOOOOO

two things. first, I understood math now better. second, you are so beautiful.

when She said “i know.. i know..your probably thinking” i thought she caught me thinking how amazing she looks. <3

i learnt more from this than from my teacher thanks

What happens if u have to multiply the equation with a big number?

Tysm your way more helpful then my teacher

My love will you marry me cuse your the one that completes my problems when ever I need help

Why do we multiply the equation without 1y by 4… Is it only for or because the first number is for |-4|

*Hottest brain on Youtube*

Super helpful!!

Yea! Nansi I love your explanation ❤️.

To help you guys out… set speed to 1.25x

Can you please do a video on Ap,gp and HP..

can you actually be my math teacher lol

Can somebody help me in solving this?:- a) 3x+4y=24 and b) 4x+3y=22…..:-(

Multiply the top by 4 and bottom by 3 with a negative sign?you’ll get something to be zero and then you could divide to get y. Am I correct or no?

X = 16/7 Y = 30/7

I don’t know the answer that’s why I asked.

@stephen barker thanks for your help.

@Estifanos Tolemariam your welcome im a level maths student im useless at revision any advice

If she was my teacher i would pay way more attention

Thank you!Very cool!

dang she is hot and samrt and the same time @raphealramez is my insta hit me up on there

Lord! She’s just Brilliant!

MAM u r so beautiful and your teaching skills entertain us and help us to understand fast so plz keep making new videos on math topics thankyou

Who else have a test today

Tommorow

Thank you! In school it took more than an hour to teach this and I still didn’t understand, this video taught me in 6 mins!

Thanks now I get it

Thanks

Calling this video outstanding will be an understatement. Instructor did a great job of explaining; very thorough and did not miss any details. Great job !

Fucking hated this shit back in highschool

Still don’t get it, I’ve spent an hour plus watching videos and tutorials, no one seems to explain the fundamentals of algebra and why we subtract/multiply…

Lol ahhh math. And also, life tbh.

“So, you do this and also that and that”

“BUT WHY THO??!!”

Ahhhh. Indeed. Why tho. :’)

Thanks

Thank you 😊

Mise en place

It can be solve oraly!!!

You explain so well! This video helped me a lot. Could you also start videos for AMC8 and other math competitions?

Thanks you mem

Does she write in reverse

So does she type backwards or what? lmao

We love your videos…a lot! Straight from the ROCK!

Number 1.1x=7,then plug into equations for y

how can i solve this 5x+2y=-13

4x+6y=-28

This was so helpful thank you 🙂👍🏼

Omg thank you so much I was so confused when my teacher told me this but now I get it thank you

Wow. My math teacher sent this, and it actually makes sense now! Thank you!

Now for real this just help me pass one of my tests thank you

7:25 Where did she get the 4 from?

i’m stupid but how does she write backwards or is she not

I am wondering too

Did anyone else get sent here by ur teacher? lol

WHY DID THEY TEACH ME IN THE HARDEST WAY POSSIBLE! I have a test tomorrow and this really helps! Thank you so much! 🤗

THANK U

thank you for the help anyways, still cant find the right video

i know this is unrelated but your shirt really complements your eyes, and thank you for your help, your amazing

Thanks a lot Nancy!!!

Thank you!!!

الشرح جميل ولا غلطة الصراحة ❤️🤷🏼♂️

Sorry …learnt nothing

Failed my test had to retake an this helped alot

u thic lol

Better than that randy orton lookin math teacher

Just imagine if she was wearing spectacles…..wudn’t she look like a nerd…..(no offence)

Thanks this really helped with my hw

Love you

😍

this help me lot for my test.

Subscribe to me

OMG thank u so much now eliminating is so easy fpr me

Wowww you’re a great teacher!!!

thank you so muchhh!! i wont fail my competition tomorrow!!

OMG THANK YOU SO MUCH! my maths teacher was not explaining this but just writing it on the board. i finally get it yayay

Can see tell me how to solve this -6x-6y=6

X-6y=27

transitions sounds like dental drills

Well done 😎

anyone else hear tht sound at 5:06 ???? shook.

12:39 Hold up, you cant just change the number like that. You didn’t even explain that change so how am I supposed to understand.

You can. As long as you do it to both sides you can

cute

I love you madam…

thaanks

problem involving simultaneous equations may be solved by? Tell me

Thank you so much I was confused as hell when my teacher was teaching it in class. Thanks a lot!!

Thank you so much Nancy this really helped ALOT!!!

Thank you this was very helpful but please can you do more complicated sums in the next session.. I’m really confused by them.

Im getting frustrated at -6

I just flunked an online college Algebra class because the teacher just made us watch videos and taught nothing. Her videos, as an example, only showed your first set of easy to solve equations. However, the final had equation sets like your last example. Thank you, because this now makes sense.

Estas bien bonita

wow learned so much faster.

I would try to watch and learn but ur tooo hot so I cant pay attention

You single???😅😅

wooow I really understand now , cuz I got a 47 in math but now everything is easy to me , imma tell my teacher about u , ur amazing thank u so much 🙂

Do you not know how to use proper grammar, or are you just partially brain dead. LMFAO

1 to 10 I give you 10🔥🔥💪

You don’t have to like math, but you can like my video. wow”! LOL

my math sir makes this thing as hard as diamond thank u so much for making this so easy for me to understand 😉👌😁😁

Yeah they have a complex way of saying anything in maths, don’t they? One woman explained a problem to me by calling the pronumerals ‘letters’ instead, and that made it way easier to think about it and solve it.

Thanks a lot

I am from Bangladesh. I want to go to your country for studying. But how can i it?

wopw

Are you single ?

I’ve been trying to learn this for a week and somehow magically learn it in 5 minutes

selena 20min

Bro it’s so easy

im sayin lol wtf i should have been here the whole damn time

selena this video is 19 mins

Omg I finally got it. Thank youuuu

Tell me why she explained this way better than my teacher 😂

This is wht math needed …hot girl

Plot twist:Shes writihg on the camera lens

You a hottie

Mr.Jimenez I’m stealing your girl

mem u r so cute the way of your teaching is too good

whatta face

Thank you so much for your clear explanation. I am a 51 year old helping my daughter with her Maths and your great gift at teaching has made it all come back. You are terrific and very generous in sharing your knowledge.

şanslısınız gençler biz şenolu izleyek siz bunu

sonra neden anlamıyosun

vaya mierda

Thank you so much. I have a test like… in less than an hour so this is really helpful, ’cause, I’m terrible at math.

Franchesca Netto I have a test next hour lol

I wish every teacher was as clutch as you fr fr other teachers be plotting on my down fall

Thank you so much I have so much trouble learning

why can’t my math teachers be attractive like you 😀

^^^

@Elyon Castanon YO 😀

Why you multiply all by 4 in the second equation example.

Tbh the thumbnail really helped me.

you cant have 0x or 0y theres always a 1 in front of them therefore that’s invalid

The answer was invalid?????? No it wasnt.. therefore her adding a “0y” as a “placeholder” to help people better understand was perfectly acceptable and valid

hahaha, people blame the teacher for not learning the easy way, or none at all, I think most of you were just sleeping in class or distracted with the opposite sex while your teacher was teaching the same way this lady does. And yes, Math is easy if you pay close attention and FOCUS on the lesson! lol!

Yes… because every teacher in the world will do everything the same… lmao!!

Thanks mam I am from India

it was amazing well gonna ace the quiz tmrw thank you

i just relized that i should not go to school anymore lol>>>>>>

you’re beautiful! thank you so much for all the help. 😉

well god damn you just might be the finest maths teacher in the world.

it’s fantastic I learnt faster

Mashallah mashallah

Great job madam

My exams are here and this is helping me. You explain it a lot easier for me than my teacher does

I loved math after watching you

Let’s ask her to dance for us.

Thanks u so much I needed this so much😭

Fantastic

thanks for clarifying in such a simple way!

Can you please dance for us.

Oh my god, you are so cool and edgy, please don’t cut us with your edge.

THANK YOU!!!!!!

i seriously need someone to explain how to do questions like these.

3x – 4y + 11 = 0

5x + 6 + 7 = 0

i cant understand how to deal with both 0.

Before you can solve the equations, you have to put them in the standard form of a line (AX + BY = C). In order to do this for the system you presented, you need to subtract 11 in the first equation, so it looks like this: 3x – 4y = -11. In the second equation, you would subtract 7, so it would look like this: 5x + 6y = -7. Then, you could solve the system. I would probably go for the “y’s” since they already have opposite signs, but you could get rid of the “x’s,” if you wanted to. The numbers would be slightly smaller.

@twistedblktrekie thank you so much it helped me a lot.

@Wshn You’re welcome.

OMG Nancy I love you I spent like three month learning this at school but now I learn it in 20 minutes thank you I give you a like and I suscribe to your channel.😍😍😍😍😍😍😍😘☺️

When the sign are same what do u do

U forget that part

Why four

What about 3g+h=7 , g +6h= 12

Can u slove this for me

تعال خاص i love you very mach

😘

are you really writing backwards? I’m trying to focus but I can’t cuz I keep wondering…

lol me too ahah

This was so helpful. I had no idea how to do this as all the other videos were unclear and messy. Not only this they didn’t use equations that needed either 1 or both sides to be multiplied. Thanks this was the last part I needed for my math exam tomorrow (technically today as I have been up all night into the morning studying… oops).

such a QUEEN! thank you soo much ! i had no clue now i kinda have a clue ahahhahahh

tysm this video is a life saver <3

good question… YOU DON’T

lmao i died

She is a goddess !!

The added soundeffect when you writing on the board is super annoying Nancy, you should really remove it

this was super helpful

you so beauty and intellgent my dear

Very great video, thank you 👍 👍 🌺 🌺

There is another thing to put on this math issue, Nancy, also, which one it is, 1000 mio. is, forever & still a MILLIARD, thus successively, w. 0(!) further comment, mine, you all, pls. take it for, whatever it’s worth, also a mio. into 3rd power, forever & still a TRILLION – etc. etc., so I can find out etc., Peace, ‘Jartuferatu,’ Chile, The Danish Law, Human Rights, 0056965056701, arentved@gmail.com.

Ma’am how will we conclude the solution of an inconsistent pair of linear equations in two variables by elimination method?

Thank u very much for helping me

Nice trika

THANK U

Fucking love this channel not only is she beautiful, she explains so well. Fuck schools. Respect to you ma’am.

Thank you so much mam..got full marks cause of..I didn’t touch my book..instead I saw all your videos..thanks a lot mam

Magical

Idk If I’m dumb but I prefer elimination!

It’s hard to learn math with one hand

Do you have any videos on solving non-linear systems?

You make everything easy

I want her to be my teacher at my school. I never understand what my teachers are saying. But the way she explains it, it makes it so easy to learn.

because she has patience and explains everything carefully

you are amazing. please keep up the great work and don’t stop making these great videos

Thanks a lot teacher!

.

Awesome video thank you very much

Great learned a lot thankyou

I love youuuuu ❤

Clear

I’ve been searching everywhere for this girl……now what

Thank you Nancy! You are the best! How is it possible to be so smart and pretty in the modern life??? You are probably from other planet))

So nice, i really enjoyed your lecture.

finally someone who makes sense

I learned this equation in 20 minutes with you compared to my 40 minutes learning

So clear and comprehensive… I subscribed after the first video, thank you!

Hey ! I just wanted to tell you Thanks for all your help, Your videos always help me so much easier than teachers would’ve been able to do for me in just a period of 20 minutes, I appreciate it !

Goddamn amazing 👍

Thank you for making maths so easy

Very helpful thank u so much

Omggg thank you!!

How the hell does she writes like that

Less talking more solving please

I’m not sure what she did at 12:39

Thanks, Nancy, you are the best math teacher that I have met and I wished I ever had had! Please make more Math videos with simple way of teaching that you have done…thanks

you are good but you talk alot.

lovely voice.

you are very good at teaching, I seem to understand all your lessons. Thank you so much

I’m a mathematician, I know this stuff like the back of my hand, yet still I watch it! Kudos Nancy!

@Tharusha SithuminaI tried to say your name out loud and the furniture in my room started levitating.

@Daniel Sevillano You’re welcome

@Daniel Sevillano lmfaooo I literally laughed out loud😂😂😂😂🔥🔥🔥

I don’t know the back of my hand??? But I now know this stuff.

@Poojitha Mucherla How do you not know the back of your hand? You blind or something?

i have a crush on my teacher nancy

great

i could not understand anything after seeing this i really help me . thanks a lot

how to write backside of glass 🤐

Gr8

Easy after the video impossible before the video

wow awesome!!

Nancy I loved math because of you. Allah bless you

NANCY SO FINE I JUST CAME HERE TO LOOK AT HER FACE INTELLIGENCE IS BEAUTIFUL

all of these examples on youtube give you the most easiest equations as possible!! my first questions in my school work are way harder and i cannot apply this technique to it lol as i do not know how

Once more you have saved me! thank you

I understand Solving Systems of Equations at 19:40 only in one day and my teacher took 3 weeks and I didn’t understand anything.

thank you sooo much u saved me

Thank you

I love you woman .

I’m legit looking at my clep study guide to test out of this class while watching your videos. listening & watching the way you explain it makes a lot more sense than on paper! Thanks!

After this video I still don’t know what to do imma fail

that is some next level shiit right there THANK YOUU

thank you very much Nancy

When my ears picked up how slowly and calmly you were instructing every step, I knew at that very moment that you basically saved my whole life. 💖🙌

18:20 Yes! That is where DASS comes in. Different Add Same Subtract. And since there is a plus and a plus sign which are the same, you may subtract

Omg saved my life. Thank yu

wow…

add the equations vertically

simplify for variable

take the x-value and plug it in

solve algebraically and isolate the variable

MY TEACHER could have said it like that but noooo

Thanks, your a great teacher and I am tired of getting yelled at and asked were you not paying attention?!

What about if you have two x variables with one having a coeficciant of -6 and the other 8. You cant use the combination method because they are already opposite signs. Im confused on what to do.

You look like my year 10 maths teacher

Another explanation for no solutions in her example is that the equations are actually parallel on the graph (not always the case but relevant to problem at hand) or if it has infinitely many solutions is that it is the exact same equation which can simplified.

Love u 😍

I literally have forgotten basically ALL of math that I learned in high school. And tbh before boys happened, I did well in math, and LOVED algebra, I’ve just remembered.

It’s not really in my mind anymore, but I think this video helped me be RE-in love with it. :’)

Imma relearn the things now because of it. I actual miss knowing algebra.. What a life plot twist wtf hahaha. <3 <3 <3

Thank you so much :3 <3

Wow I learned more from 20 min of you then all semester from my teacher 😂

Okay, talk. What camera are you using?

If you were my teacher i would’ve been the topper of my class

Don’t you tweak both

Oh she’s eliminating the x why didn’t you just eliminate the y tho🤷🏾♀️

She didn’t eliminate the x, she canceled out they y and then solved for x. That was by far the easiest way to solve the equation and the way she did it.

I don’t get this equation that I have any help?

6+c=-2q

6-4c=5q

It becomes

2q + c = -6

5q -4c = -6

Thank you! I’ve been struggling with this for a while, but you put it very simply and got straight to the point. Most helpful 20 minutes of my life lol

Thx thx thx thx thx thx you lv you

She teaches better than my teacher

Can we admire that she’s writing backwards the whole video….

Would you like to go to Starbucks after class?

I learned so much!

what would you do if you had to add -4x and 4x to find x? i don’t understand because it would just cancel out the x, but that’s the part you’re trying to find

you should make these videos for the whole algebra book

Thank you Nancy Pi

why can u be my teacher

Thanx nancy

u are so good at math that from now on im gonna call u Nancy Drew BTW i have a math exam tomorrow 🙂

Love from India

thank you so much!

Hottest math teacher ever. Not even gonna cap, you helped me complete my homework assignment. I appreciate it nice job 👍

JJ_Gamer Jimenez Ranera cool cool cool cool

I kinda agreed

@JJ_Gamer rs

😂

Are you left handed, or is it just a visual illusion?

do you actually write backwards?

I am know love math , you are the best

I love it.. it’s like a game to.. 👏

Omg 😱 I wish I could shake your hand. I was struggling with this until I came upon your videos! Huge thank youuuuu

Absolutely excellent instruction: clear, concise, comprehensive, simple. Thank you SO much for what you are doing to encourage and give hope to so many of our children. It has been 30 years for me and even I picked this up like it was nothing!

Be my teacher😍😍😍

Thanks Nancy you’re so smart and make everything so easy. My teacher used to explain this on a whole period and just in this video i learned what he taught in one week. IDK if i understand better because you’re cute and sexy lol or if you just explain it better.

Thanks i had had the test in grelade 9 i just pass it because of u thank you

Grade

Thank you

you look like a stay at home mom😂

You are the best

I learned so much man.

Wow, this was so helpful! I’ve been trying to learn this for 2 weeks and I didn’t get it at all until now. Thank you!

I like the information

What about if is -2x

-3x😦

my mom wants to know if you do asmr lol

My math teacher is probably one of the worst teachers I’ve ever had. My math class talks the whole time and I can’t hear anything while my teacher’s mumbling how to do the problems in super small handwriting. I had no idea how to do this at all. Thank you. Thank you so much. I actually learned.

Absolutely fantastic video. Makes the solution of equations very easy to comprehend. Thank you!

Thank you so much this will help me with my exam so much

Hold on. I daresay she is writing on the board backwards!

Thank you.

Really helped me, thank you!

Thank you. You made much easier

Thank you best teacher out here for reaaaal was struggling before watching your videos 😂

If you would be my teacher in the school,I would have 100% attendance 😁😛

oh g’day mate I have subscribed, liked ya’re video and ringed the notification bell

tysm ya rlly help ma ya teach way betta than my teacher

Ya sure have did ur MIT math teacher proud

Why did we use 4 for the 2nd method?

Everything was going good untill 4:53 how did she get 5y because didn’t she just subtract it by -6

same..

Wow this is great! Can u tell us how u edited your video to look like this? I mean wen u write but facing the camera pliz

Thank u soooooo much

My

Ghosh such a pretty mathematician. But please don’t outsmart the guy. It’s going to be hard in a relationship unless he’s very smart. Or another simple Way. Humility wow

This make sense now.

OMG you are simply beautiful inside and out. I learned more in the 20 minutes with you stopping and rewinding than I have in two semesters. Keep doing what you do. I finally get it. Just wonderful. God Bless you sweetsugar!

I am trying to concentrate the subject but it’s really hard for me. 😅

My whole concentrate on you. 😐

Hello i have confusion in the following question :

x-6y-4z=0

2x+2y+6z=0

4x+3y+11z=0

Find the value of X,Y,Z ?

god this is so bloody complicated

Nancypi do you have to watch yourself in a mirror and also write everything in reverse and backwards in order to make these videos????

what a questains

Mam you are too beautiful…😍😘😘

Hottest math teacher 🎊

Thank you thank you thank you so so so much

Is this also Linear Combinations?

Thank you

Where did you get 4 in problem # 2

Thank teachere

cca?

Bravo good

Woow ur teaching method is awesome…I’ve learnt a lot .. thanks alots 🥰🥰🥰

Just me, or is her voice soothing?

Wyatt Lambert all of her is soothing

@Scallywag Nice

Your not alone

@Scallywag true.

Where did you get the second equation from? Why isnt it simply one to solve?

I would not be able to learn with her as a teacher bc I’d be focused on her instead of the math

your teaching has really helped me a lot, i don’t know how to appreciate you enough Nancy, but i was wondering. If you can do a little bits of recap on chemistry and physics. please

Con maestras así si voy a estudiar yo

I HAVE SEEN THAT YOU ARE ADDING NUMBER BOTH SIDE AND ELSEWHERE SUBSTRACTING AND OTHERS MULTIPLYING . IT CANT BE CLEAR .HOW ONE CAN MAKE CHOISE TO SUBSTRAC MULTIPLY ADDING .THERE MUST BE A RULE CAN MAKE CLEAR ABOUT THESE SYSTEM.

Just wanted to let you know that Jesus loves you so very much even if you dont belive it

Kiss me

Got exactly what i came here for. Thank you

wow it helps a lot i am learning elimination and this helped alot thanks!!!!!!!!

Can u give me your contact

Madam you MULTIPLY 4 IN ONE SIDE . SO THIS NUMBER CAME FROM YOUR POCKET. SO IF I WANT DO LIKE OTHERS CAN I TAKE ANY NUMBER FROM MY POCKET. WONDERFUL. WAAW

Thank You.

When you ARE near blackboard .I havent seen you walking. Just moving hands what is happen to

you are really the one for equation

thanks! very helpful 🙂

This was so helpful thank so much 🙂🙂

LOVE IT NOW MATH IS MY BEST FRIEND THANKS NANCY

wow so my during this whole quarantine my teacher posted this with a video that didn’t help and most things algebra i’ll understand…… if it’s explained to me right but she went step-by-step and not only did she do more then one problem she didn’t do the easiest one….. what I’m trying to say is she just saved me from ripping out my hair. THANKS SO MUCH, YOUR AMAZING!!!

@NancyPi Is solving system equations a collage entry math?

Thnx really splendid 👍

I have a question how did you clean it up for 12:30 I got kind of confused

Sorrans MUM LOL

When it does the timelaps thing for a second or two you can just see the emotion on her face just change, 4:12 for example

Nancy you should be a model besides a good teacher

Yoh wtf I always get the first one right (y) and the second one wrong(x)🤦♂️😂

but in the first equation, what if the Y doesnt cancel out

tooo leng

Oh my goodness for so long i was just blank and blur when my teacher taught this now i understood in 20 mins

I have been a math teacher for 25 years. I am now using your videos to help my students adjust to distance learning. You do a great job, Nancy. Your voice is very calm and you demeanor is reassuring. Thank you!

Thanks this one really helped thankkkkkkkk yoouuuuuuu very much 😍😍

You teach so good. Thnx

Great staff.. I also do maths tutorials on my channel

How the hell are you writing backwards lol

Who here from online school??

Wow she is the most beautiful teacher

online finals studying wya

This is really nice💪😊

Test richtig Zeit ziehen wichtigsten Probe nächstes unbekannt Frage 323232 möglich sprechen natürlich gewinnt du doch komische ein Zahl nichts ist letztes ist wirklich alles wie 0 beginnen funktioniert 2 eigentlich

this helped me alot thankyou.

I don’t know! why she write like that?😂😂😂

how can i remove the negatoves

where did you remove 4

That helped a lot thank you

Not strict enough, too many words and the explanation is too lengthy and could be more concise, but a good example explained.

Many thank and appreciation to you.

PLEASE do substitution

me wondering cant i just subtract . hold up “P.S . Yes , you can substract instead” hahaha loved it

Nice video,👍

#EducationNext

You made me understand it, thank you very much

This really coming in clutch for quarantine time🤣

how do u solve

-9(2x+2y=19)8

2(14x+9y=126.75)

great help

Nice!!! Thank you so much!

Thank u

Groovy video, thank. I’ve always used substitution but I kind of like this better anyways.

Online school gang

lol

Thank you this really helps🥰🥰

Best explanation ever I see

Very clear explanation thanks

thanks a lot Nancy for making out time to educate people like me, who really need help in maths.

Is she behind a glass wall??

gotta say thats helpful and plus your so gorgeous …….

Yup, she is helpful and gorgeous

Yes ooooooooo teacher truth and practic. Thank.

Ur voice and urs teaching skill are super who agree for these like it

I don’t really know what to say, or where to start. Why isn’t it mandatory to teach math this way? There is definatley a science to teaching and… wow! Thank you! 😃

Good teaching love from India punjab

We r here just after watching the thumbnail and also I was not concentrating on the right side i was just focusing for left side…

Amazingg

Hi my name is Syed Shoaib Akhtar S.W you doing lesson is very understood and best

You can help me

Please help me

You help me. I can join your school

mam i understand everything what u have teach us ur teaching style is very nice.our method of teaching is very very gooodd😎😎😎😲😎😊😏😆😗😚😇😚😏😆😏😆🙄😂😍😂😍

Nice 👍

Thank you, for doing such a great job of explaining everything. Please keep up the good work!

amazing i actually learned

I don’t know if you’re gonna reply lol, but at 7:49 you multiplied the equation by 4, how do you know what number to multiply it by?