X+2y=-18X-2y=-2

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Solution for X+2y=-18X-2y=-2 equation: 



X+2X=-18X-2X=-2

We move all terms to the left:

X+2X-(-18X-2X)=0

We add all the numbers together, and all the variables

X+2X-(-20X)=0

We add all the numbers together, and all the variables

3X-(-20X)=0

We get rid of parentheses

3X+20X=0

We add all the numbers together, and all the variables

23X=0

X=0/23

X=0

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