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-55=-8c-(7-2c)
We move all terms to the left:
-55-(-8c-(7-2c))=0
We add all the numbers together, and all the variables
-(-8c-(-2c+7))-55=0
We calculate terms in parentheses: -(-8c-(-2c+7)), so:We get rid of parentheses
-8c-(-2c+7)
We get rid of parentheses
-8c+2c-7
We add all the numbers together, and all the variables
-6c-7
Back to the equation:
-(-6c-7)
6c+7-55=0
We add all the numbers together, and all the variables
6c-48=0
We move all terms containing c to the left, all other terms to the right
6c=48
c=48/6
c=8
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