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-86=-3c+4(5c+4)
We move all terms to the left:
-86-(-3c+4(5c+4))=0
We calculate terms in parentheses: -(-3c+4(5c+4)), so:We get rid of parentheses
-3c+4(5c+4)
We multiply parentheses
-3c+20c+16
We add all the numbers together, and all the variables
17c+16
Back to the equation:
-(17c+16)
-17c-16-86=0
We add all the numbers together, and all the variables
-17c-102=0
We move all terms containing c to the left, all other terms to the right
-17c=102
c=102/-17
c=-6
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