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 9
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
For any given system of equations, you have a choice of 3 (or perhaps 4) methods for solving: graphing, substitution, elimination, and maybe matrices, if you've learned them. All methods will work for any given problem you'll get the correct answer  but often one method would be easier than another. In short, use graphing if the lines are already in y = mx+b form and you have a ruler and graph paper handy, use substitution if one of your variables has a coefficient of one, use elimination if the coefficients of one of your variables are additive inverses, and use matrices if you are allowed the use of technology. Always check your solution point by plugging the x and y values back into both 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”
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 10,172 viewsSolve the system:
4x − 2y = 7x + 2y = 3 
Solving a System of Linear Equations in Two Variables
Problem 2 6,357 viewsSolve the system:
2x − 4y = 35x + 10y = 7 
Solving a System of Linear Equations in Two Variables
Problem 3 5,148 viewsSolve the system:
6x + 21y = 12x + 7 y = 2 2 
Solving a System of Linear Equations in Two Variables
Problem 4 709 views 
Solving a System of Linear Equations in Two Variables
Problem 5 671 views 
Solving a System of Linear Equations in Two Variables
Problem 6 660 views 
Solving a System of Linear Equations in Two Variables
Problem 7 539 views 
Solving a System of Linear Equations in Two Variables
Problem 8 597 views 
Solving a System of Linear Equations in Two Variables
Problem 9 502 views 
Solving a System of Linear Equations in Two Variables
Problem 10 530 views 
Solving a System of Linear Equations in Two Variables
Problem 11 479 views 
Solving a System of Linear Equations in Two Variables
Problem 12 332 views 
Solving a System of Linear Equations in Two Variables
Problem 13 349 views 
Solving a System of Linear Equations in Two Variables
Problem 14 312 views 
Solving a System of Linear Equations in Two Variables
Problem 15 318 views 
Solving a System of Linear Equations in Two Variables
Problem 16 332 views 
Solving a System of Linear Equations in Two Variables
Problem 17 282 views 
Solving a System of Linear Equations in Two Variables
Problem 18 323 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete