8b-13=21

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Solution for 8b-13=21 equation: 



8b-13=21

We move all terms to the left:

8b-13-(21)=0

We add all the numbers together, and all the variables

8b-34=0

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

8b=34

b=34/8

b=4+1/4

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