B-1=-13+7b

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Solution for B-1=-13+7b equation: 



-1=-13+7B

We move all terms to the left:

-1-(-13+7B)=0

We add all the numbers together, and all the variables

-(7B-13)-1=0

We get rid of parentheses

-7B+13-1=0

We add all the numbers together, and all the variables

-7B+12=0

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

-7B=-12

B=-12/-7

B=1+5/7

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