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45=3(b-65)
We move all terms to the left:
45-(3(b-65))=0
We calculate terms in parentheses: -(3(b-65)), so:We get rid of parentheses
3(b-65)
We multiply parentheses
3b-195
Back to the equation:
-(3b-195)
-3b+195+45=0
We add all the numbers together, and all the variables
-3b+240=0
We move all terms containing b to the left, all other terms to the right
-3b=-240
b=-240/-3
b=+80
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