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3b-18=4b+8
We move all terms to the left:
3b-18-(4b+8)=0
We get rid of parentheses
3b-4b-8-18=0
We add all the numbers together, and all the variables
-1b-26=0
We move all terms containing b to the left, all other terms to the right
-b=26
b=26/-1
b=-26
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