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2(b-3)=-8
We move all terms to the left:
2(b-3)-(-8)=0
We add all the numbers together, and all the variables
2(b-3)+8=0
We multiply parentheses
2b-6+8=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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