b-4+7b=-20

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Solution for b-4+7b=-20 equation: 



b-4+7b=-20

We move all terms to the left:

b-4+7b-(-20)=0

We add all the numbers together, and all the variables

8b+16=0

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

8b=-16

b=-16/8

b=-2

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