84=7b+56

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Solution for 84=7b+56 equation: 



84=7b+56

We move all terms to the left:

84-(7b+56)=0

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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