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(x-2)+(x)+(x+2)=-87
We move all terms to the left:
(x-2)+(x)+(x+2)-(-87)=0
We add all the numbers together, and all the variables
x+(x-2)+(x+2)+87=0
We get rid of parentheses
x+x+x-2+2+87=0
We add all the numbers together, and all the variables
3x+87=0
We move all terms containing x to the left, all other terms to the right
3x=-87
x=-87/3
x=-29
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