89=7(8)+b

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Solution for 89=7(8)+b equation: 



89=7(8)+b

We move all terms to the left:

89-(7(8)+b)=0

We add all the numbers together, and all the variables

-(b+78)+89=0

We get rid of parentheses

-b-78+89=0

We add all the numbers together, and all the variables

-1b+11=0

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

-b=-11

b=-11/-1

b=+11

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