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8=2c-7-7c
We move all terms to the left:
8-(2c-7-7c)=0
We add all the numbers together, and all the variables
-(-5c-7)+8=0
We get rid of parentheses
5c+7+8=0
We add all the numbers together, and all the variables
5c+15=0
We move all terms containing c to the left, all other terms to the right
5c=-15
c=-15/5
c=-3
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