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-3(-b-3)=6
We move all terms to the left:
-3(-b-3)-(6)=0
We add all the numbers together, and all the variables
-3(-1b-3)-6=0
We multiply parentheses
3b+9-6=0
We add all the numbers together, and all the variables
3b+3=0
We move all terms containing b to the left, all other terms to the right
3b=-3
b=-3/3
b=-1
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