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-7b-8(b=4)=88
We move all terms to the left:
-7b-8(b-(4))=0
We multiply parentheses
-7b-8b+32=0
We add all the numbers together, and all the variables
-15b+32=0
We move all terms containing b to the left, all other terms to the right
-15b=-32
b=-32/-15
b=2+2/15
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