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112=-7(b-8)
We move all terms to the left:
112-(-7(b-8))=0
We calculate terms in parentheses: -(-7(b-8)), so:We get rid of parentheses
-7(b-8)
We multiply parentheses
-7b+56
Back to the equation:
-(-7b+56)
7b-56+112=0
We add all the numbers together, and all the variables
7b+56=0
We move all terms containing b to the left, all other terms to the right
7b=-56
b=-56/7
b=-8
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