86=-8b-7(7-5b)

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Solution for 86=-8b-7(7-5b) equation: 



86=-8b-7(7-5b)

We move all terms to the left:

86-(-8b-7(7-5b))=0

We add all the numbers together, and all the variables

-(-8b-7(-5b+7))+86=0



We calculate terms in parentheses: -(-8b-7(-5b+7)), so:

-8b-7(-5b+7)

We multiply parentheses

-8b+35b-49

We add all the numbers together, and all the variables

27b-49

Back to the equation:

-(27b-49)



We get rid of parentheses

-27b+49+86=0

We add all the numbers together, and all the variables

-27b+135=0

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

-27b=-135

b=-135/-27

b=+5

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