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-2(b-54)=-28
We move all terms to the left:
-2(b-54)-(-28)=0
We add all the numbers together, and all the variables
-2(b-54)+28=0
We multiply parentheses
-2b+108+28=0
We add all the numbers together, and all the variables
-2b+136=0
We move all terms containing b to the left, all other terms to the right
-2b=-136
b=-136/-2
b=+68
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