2b-31=21

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Solution for 2b-31=21 equation: 



2b-31=21

We move all terms to the left:

2b-31-(21)=0

We add all the numbers together, and all the variables

2b-52=0

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

2b=52

b=52/2

b=26

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