-86=8b+7(-4b+2)

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Solution for -86=8b+7(-4b+2) equation: 



-86=8b+7(-4b+2)

We move all terms to the left:

-86-(8b+7(-4b+2))=0



We calculate terms in parentheses: -(8b+7(-4b+2)), so:

8b+7(-4b+2)

We multiply parentheses

8b-28b+14

We add all the numbers together, and all the variables

-20b+14

Back to the equation:

-(-20b+14)



We get rid of parentheses

20b-14-86=0

We add all the numbers together, and all the variables

20b-100=0

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

20b=100

b=100/20

b=5

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