84=7(b+8)

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Solution for 84=7(b+8) equation: 



84=7(b+8)

We move all terms to the left:

84-(7(b+8))=0



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

7(b+8)

We multiply parentheses

7b+56

Back to the equation:

-(7b+56)



We get rid of parentheses

-7b-56+84=0

We add all the numbers together, and all the variables

-7b+28=0

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

-7b=-28

b=-28/-7

b=+4

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