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3(b+12)+8=5b-3
We move all terms to the left:
3(b+12)+8-(5b-3)=0
We multiply parentheses
3b-(5b-3)+36+8=0
We get rid of parentheses
3b-5b+3+36+8=0
We add all the numbers together, and all the variables
-2b+47=0
We move all terms containing b to the left, all other terms to the right
-2b=-47
b=-47/-2
b=23+1/2
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