3b+7b=20

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Solution for 3b+7b=20 equation: 



3b+7b=20

We move all terms to the left:

3b+7b-(20)=0

We add all the numbers together, and all the variables

10b-20=0

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

10b=20

b=20/10

b=2

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