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56=7(c-3)
We move all terms to the left:
56-(7(c-3))=0
We calculate terms in parentheses: -(7(c-3)), so:We get rid of parentheses
7(c-3)
We multiply parentheses
7c-21
Back to the equation:
-(7c-21)
-7c+21+56=0
We add all the numbers together, and all the variables
-7c+77=0
We move all terms containing c to the left, all other terms to the right
-7c=-77
c=-77/-7
c=+11
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