Solve for x in the following system.

6x + 6y = -2
y = x

I'm not sure how to get x, because when I tried it left me with both y and x

3 answers

y = -x*
6x + 6y = -2

6x = -2 - 6y

x = (-2 - 6y)/6

x - -2/6 - y
6x+6y=-2
x=y
6y+6y=-2
12y=-2
y=-1/6
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