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

use substitution
y=x-3
4x+2(x-3)=12
4x+2x-6=12
+6 +6
_______________
6x=18
x=3
substitute x in original equation
3-y=3
-3 -3
______________
-y=0
y=0

(3,0)