Systems of Linear Equations (Word Problems)

3 Story problems involving systems of linear equations in two variables. We discuss how to write the 2 equations in 2 variables as well as how to solve the equations using the substitution method and the elimination method. We also discuss tips on selecting descriptive variables and making use of charts to organize your variables and data.

0:15 Example 1
0:43 How to Identify the Variables to Solve For
0:48 How to Label Your Variables
1:52 Using Elimination to Solve the System
3:50 How to Write Your Final Solution in a Story Problems
4:23 Example 2
5:20 How to Translate the Sentence into an Equation
6:20 Solve the System Using the Substitution Method
7:34 Example 3 Distance, Rate, Time Word Problem
8:03 Organize Information in a Table

Related Videos:

My Playlist of Videos Regarding Systems of Equations

Solving Systems of 3 Equations Using Elimination

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[jacquel.]

Thank you so much, I totally did not know how to do this despite paying attention in class, and now I understand it.

[shannonsmith]

Honestly to good grief I'm living on your tube! My College education did not prepare me to teach this stuff to my kids who are all on lock down now! Furthermore even the stuff I DID know as both a teacher and College student flew out the ears about 8 years ago you saving my sanity!

[quantheblob]

Teachers during quarantine: Not talk about it and then say it's homework
Mario: Ok soo basically this stands for..

[nikkixchanelslife]

I literally have a math GED to study for and your videos have helped me tremendously.. thank you so much and may God bless you ♥️

[raimundwarbasse]

My teacher put the exact problem onto the worksheet. This is the only one where he showed me the answer. Thx!

[blubalz]

I swear to god when I watch the videos I understand so well, but when I try to do a practice problem on my own, i'm fucking lost and clueless. Any help/tips for that?

[iambcuzofu]

I don’t understand how you get the numbers to multiply the equation. Why did you choose -3?

[its_lemon_]

4:44 Thanks there was a problem like this on the test and me and a lot of other kids didn't finish so we get to finish on Monday and I was confused on the less than times part.

[andrewfroggie]

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[NatashkaHavins]

Love your vids, you're so awesome!

[bobbyboywonder]

Job very very well done sir. Really like your style and clarity and brevity as well.

[Dokujas]

how would you identify the x and y value to put it into slope intercept form?

[romina]

This is such a great video and you explain it very well!! Can you please do a SAT video collection like important math topics that I should know about?

[FF-dwcl]

What if it does not contain fractions?

[yahyaabdurhmanelzanati]

it was actually helpful next time slow down a little please

[aram]

I would have rather substituted into the second equation - where c had the coefficient of 1, so it was already half-way through done

[qewz_____]

damn great tutorial. I love my teacher but this is significantly more understandable.

[niceguyjake]

When did Agent 47 become a math teacher?

[basalduat]

Please keep in mind that many of us have poor eyesight and cheap laptops. Please print much larger.

[franciscograsso]

Why dont you try explaining where you got the negative 3 from? I will NOT recommend this video, Picard!!