-13=9+8b

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Solution for -13=9+8b equation: 



-13=9+8b

We move all terms to the left:

-13-(9+8b)=0

We add all the numbers together, and all the variables

-(8b+9)-13=0

We get rid of parentheses

-8b-9-13=0

We add all the numbers together, and all the variables

-8b-22=0

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

-8b=22

b=22/-8

b=-2+3/4

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