b-7b=30

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Solution for b-7b=30 equation: 



b-7b=30

We move all terms to the left:

b-7b-(30)=0

We add all the numbers together, and all the variables

-6b-30=0

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

-6b=30

b=30/-6

b=-5

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