-7b+3b=20

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Solution for -7b+3b=20 equation: 



-7b+3b=20

We move all terms to the left:

-7b+3b-(20)=0

We add all the numbers together, and all the variables

-4b-20=0

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

-4b=20

b=20/-4

b=-5

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