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18=3(b+1)
We move all terms to the left:
18-(3(b+1))=0
We calculate terms in parentheses: -(3(b+1)), so:We get rid of parentheses
3(b+1)
We multiply parentheses
3b+3
Back to the equation:
-(3b+3)
-3b-3+18=0
We add all the numbers together, and all the variables
-3b+15=0
We move all terms containing b to the left, all other terms to the right
-3b=-15
b=-15/-3
b=+5
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