81=15x-7x-7

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Solution for 81=15x-7x-7 equation: 



81=15x-7x-7

We move all terms to the left:

81-(15x-7x-7)=0

We add all the numbers together, and all the variables

-(8x-7)+81=0

We get rid of parentheses

-8x+7+81=0

We add all the numbers together, and all the variables

-8x+88=0

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

-8x=-88

x=-88/-8

x=+11

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