Question

What is the value of the x variable in the solution to the following system of equations?

4x + 2y = 12
x – y = 3

0

−3

3

2

Answer 1

@Mertsj

Answer 2

You need to take your two equations and eliminate one of the variables, solve for the remaining, then substitute into the second equation.

Answer 3

4x + 2y = 12
x – y = 3 => *2 gives you 2x – 2y = 6

add the new equation 2 from equation 1,

4x + 2y = 12
2x – 2y = 6
------------
6x + 0 = 18 => solve for x

Answer 4

if you eliminate the correct variable, then no substitution is needed to find the value of x :)

Answer 5

x =3 @eSpeX ?

Answer 6

Yep, good job. :)

Answer 7

Thanks!

Answer 8

You're welcome.