87-15x=66-8x

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Solution for 87-15x=66-8x equation: 



87-15x=66-8x

We move all terms to the left:

87-15x-(66-8x)=0

We add all the numbers together, and all the variables

-15x-(-8x+66)+87=0

We get rid of parentheses

-15x+8x-66+87=0

We add all the numbers together, and all the variables

-7x+21=0

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

-7x=-21

x=-21/-7

x=+3

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