Like what you saw?
Create FREE Account and:
 Watch all FREE content in 21 subjects(388 videos for 23 hours)
 FREE advice on how to get better grades at school from an expert
 Attend and watch FREE live webinar on useful topics
Solving a System of Linear Equations in Two Variables  Problem 4
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
Substitution is a technique for solving by getting one variable by itself in one equation, and substituting the resulting expression in to the other equation. This creates only one equation with only one variable. Use substitution if you see a coefficient of one in either of your original equations.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
Get Peer Support on User Forum
Peer helping is a great way to learn. Join your peers to ask & answer questions and share ideas.
Sample Problems (18)
Need help with a problem?
Watch expert teachers solve similar problems.

Solving a System of Linear Equations in Two Variables
Problem 1 10,001 viewsSolve the system:
4x − 2y = 7x + 2y = 3 
Solving a System of Linear Equations in Two Variables
Problem 2 6,287 viewsSolve the system:
2x − 4y = 35x + 10y = 7 
Solving a System of Linear Equations in Two Variables
Problem 3 5,106 viewsSolve the system:
6x + 21y = 12x + 7 y = 2 2 
Solving a System of Linear Equations in Two Variables
Problem 4 667 views 
Solving a System of Linear Equations in Two Variables
Problem 5 640 views 
Solving a System of Linear Equations in Two Variables
Problem 6 634 views 
Solving a System of Linear Equations in Two Variables
Problem 7 521 views 
Solving a System of Linear Equations in Two Variables
Problem 8 579 views 
Solving a System of Linear Equations in Two Variables
Problem 9 481 views 
Solving a System of Linear Equations in Two Variables
Problem 10 482 views 
Solving a System of Linear Equations in Two Variables
Problem 11 455 views 
Solving a System of Linear Equations in Two Variables
Problem 12 313 views 
Solving a System of Linear Equations in Two Variables
Problem 13 328 views 
Solving a System of Linear Equations in Two Variables
Problem 14 296 views 
Solving a System of Linear Equations in Two Variables
Problem 15 302 views 
Solving a System of Linear Equations in Two Variables
Problem 16 318 views 
Solving a System of Linear Equations in Two Variables
Problem 17 268 views 
Solving a System of Linear Equations in Two Variables
Problem 18 306 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete