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-15=4(b-16)-19
We move all terms to the left:
-15-(4(b-16)-19)=0
We calculate terms in parentheses: -(4(b-16)-19), so:We get rid of parentheses
4(b-16)-19
We multiply parentheses
4b-64-19
We add all the numbers together, and all the variables
4b-83
Back to the equation:
-(4b-83)
-4b+83-15=0
We add all the numbers together, and all the variables
-4b+68=0
We move all terms containing b to the left, all other terms to the right
-4b=-68
b=-68/-4
b=+17
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