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12=2(b+17)
We move all terms to the left:
12-(2(b+17))=0
We calculate terms in parentheses: -(2(b+17)), so:We get rid of parentheses
2(b+17)
We multiply parentheses
2b+34
Back to the equation:
-(2b+34)
-2b-34+12=0
We add all the numbers together, and all the variables
-2b-22=0
We move all terms containing b to the left, all other terms to the right
-2b=22
b=22/-2
b=-11
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