3b-b=-30

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Solution for 3b-b=-30 equation: 



3b-b=-30

We move all terms to the left:

3b-b-(-30)=0

We add all the numbers together, and all the variables

2b+30=0

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

2b=-30

b=-30/2

b=-15

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