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20=4(c+4)
We move all terms to the left:
20-(4(c+4))=0
We calculate terms in parentheses: -(4(c+4)), so:We get rid of parentheses
4(c+4)
We multiply parentheses
4c+16
Back to the equation:
-(4c+16)
-4c-16+20=0
We add all the numbers together, and all the variables
-4c+4=0
We move all terms containing c to the left, all other terms to the right
-4c=-4
c=-4/-4
c=1
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