3b+1=2b+21

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Solution for 3b+1=2b+21 equation: 



3b+1=2b+21

We move all terms to the left:

3b+1-(2b+21)=0

We get rid of parentheses

3b-2b-21+1=0

We add all the numbers together, and all the variables

b-20=0

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

b=20

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