-3+3b=b-7

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



-3+3b=b-7

We move all terms to the left:

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

We get rid of parentheses

3b-b+7-3=0

We add all the numbers together, and all the variables

2b+4=0

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

2b=-4

b=-4/2

b=-2

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