8b-31=-19+7b

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Solution for 8b-31=-19+7b equation: 



8b-31=-19+7b

We move all terms to the left:

8b-31-(-19+7b)=0

We add all the numbers together, and all the variables

8b-(7b-19)-31=0

We get rid of parentheses

8b-7b+19-31=0

We add all the numbers together, and all the variables

b-12=0

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

b=12

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