SOLUTION: Solve each system by substitution. {2x+2y=2} {-4x+4y=12}

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Question 536410: Solve each system by substitution.
{2x+2y=2}
{-4x+4y=12}
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Solve each system by substitution.
{2x+2y=2}
{-4x+4y=12}
-------------
They're better suited for elimination, but
2x+2y=2 --> x + y = 1 --> y = 1-x
-4x+4y=12
Sub for y in the 2nd eqn
-4x + 4(1-x) = 12
-x + 1-x = 3
-2x = 2
x = -1
--------
y = 2