3x-(-x+7)=-87

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Solution for 3x-(-x+7)=-87 equation: 



3x-(-x+7)=-87

We move all terms to the left:

3x-(-x+7)-(-87)=0

We add all the numbers together, and all the variables

3x-(-1x+7)-(-87)=0

We add all the numbers together, and all the variables

3x-(-1x+7)+87=0

We get rid of parentheses

3x+1x-7+87=0

We add all the numbers together, and all the variables

4x+80=0

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

4x=-80

x=-80/4

x=-20

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