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15=-2(8c-4)
We move all terms to the left:
15-(-2(8c-4))=0
We calculate terms in parentheses: -(-2(8c-4)), so:We get rid of parentheses
-2(8c-4)
We multiply parentheses
-16c+8
Back to the equation:
-(-16c+8)
16c-8+15=0
We add all the numbers together, and all the variables
16c+7=0
We move all terms containing c to the left, all other terms to the right
16c=-7
c=-7/16
c=-7/16
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