x+x+x-(-87)=x

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Solution for x+x+x-(-87)=x equation: 



x+x+x-(-87)=x

We move all terms to the left:

x+x+x-(-87)-(x)=0

We add all the numbers together, and all the variables

2x+87=0

We move all terms containing x to the left, all other terms to the right

2x=-87

x=-87/2

x=-43+1/2

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