87=7-10x

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Solution for 87=7-10x equation: 



87=7-10x

We move all terms to the left:

87-(7-10x)=0

We add all the numbers together, and all the variables

-(-10x+7)+87=0

We get rid of parentheses

10x-7+87=0

We add all the numbers together, and all the variables

10x+80=0

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

10x=-80

x=-80/10

x=-8

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