b-9+7b=20

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Solution for b-9+7b=20 equation: 



b-9+7b=20

We move all terms to the left:

b-9+7b-(20)=0

We add all the numbers together, and all the variables

8b-29=0

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

8b=29

b=29/8

b=3+5/8

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