84=4(-2b+5)

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Solution for 84=4(-2b+5) equation: 



84=4(-2b+5)

We move all terms to the left:

84-(4(-2b+5))=0



We calculate terms in parentheses: -(4(-2b+5)), so:

4(-2b+5)

We multiply parentheses

-8b+20

Back to the equation:

-(-8b+20)



We get rid of parentheses

8b-20+84=0

We add all the numbers together, and all the variables

8b+64=0

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

8b=-64

b=-64/8

b=-8

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