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X+2(X+2)=-2
We move all terms to the left:
X+2(X+2)-(-2)=0
We add all the numbers together, and all the variables
X+2(X+2)+2=0
We multiply parentheses
X+2X+4+2=0
We add all the numbers together, and all the variables
3X+6=0
We move all terms containing X to the left, all other terms to the right
3X=-6
X=-6/3
X=-2
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