2x + 2y = 4
y = 12 - 3x
All you have to do is make y in the first equation what it says y is in the second equation: 2x + 2(12 - 3x) = 4
Then you solve: 2x + 24 - 6x = 4
-4x + 24 = 4
-4x = -20
x = -5
Then you plug -5 back in to an equation of your choosing: y = 12 + 15
y = 27
Using the values of x and y, your answer needs to be a point
Your answer for 15 would be: (-5, 27)