-b+3b=-2

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Solution for -b+3b=-2 equation: 



-b+3b=-2

We move all terms to the left:

-b+3b-(-2)=0

We add all the numbers together, and all the variables

2b+2=0

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

2b=-2

b=-2/2

b=-1

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