Question

2x – 2y = –12
4x – y = 3

Answer 1

what are you trying to find?

Answer 2

When using the substitution method, what expression for y in the second equation would be substituted in the first equation?

Answer 3

Well usually for substitution, you're given a value to start with.
Since you don't, solve for y by solving the system through elimination.

Answer 4

2x - 2y = -12
4x - y = 3
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2x - 2y = -12
y = 4x - 3
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2x - 2(4x - 3) = -12
2x - 8x - 6 = -12
-6x = -6
x = 1

Answer 5

y = 5

Answer 6

4x - y = 3
-y = 3 - 4x (multiply by -1 to make y positive)
y = 4x - 3 (this can be substituted in for y in the first equation)