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115=-5(3b-2)
We move all terms to the left:
115-(-5(3b-2))=0
We calculate terms in parentheses: -(-5(3b-2)), so:We get rid of parentheses
-5(3b-2)
We multiply parentheses
-15b+10
Back to the equation:
-(-15b+10)
15b-10+115=0
We add all the numbers together, and all the variables
15b+105=0
We move all terms containing b to the left, all other terms to the right
15b=-105
b=-105/15
b=-7
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