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16=-2(c+9)
We move all terms to the left:
16-(-2(c+9))=0
We calculate terms in parentheses: -(-2(c+9)), so:We get rid of parentheses
-2(c+9)
We multiply parentheses
-2c-18
Back to the equation:
-(-2c-18)
2c+18+16=0
We add all the numbers together, and all the variables
2c+34=0
We move all terms containing c to the left, all other terms to the right
2c=-34
c=-34/2
c=-17
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