2b-8=3b+21

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Solution for 2b-8=3b+21 equation: 



2b-8=3b+21

We move all terms to the left:

2b-8-(3b+21)=0

We get rid of parentheses

2b-3b-21-8=0

We add all the numbers together, and all the variables

-1b-29=0

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

-b=29

b=29/-1

b=-29

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