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3(b+3)=-18
We move all terms to the left:
3(b+3)-(-18)=0
We add all the numbers together, and all the variables
3(b+3)+18=0
We multiply parentheses
3b+9+18=0
We add all the numbers together, and all the variables
3b+27=0
We move all terms containing b to the left, all other terms to the right
3b=-27
b=-27/3
b=-9
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