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27c-9=20c+5
We move all terms to the left:
27c-9-(20c+5)=0
We get rid of parentheses
27c-20c-5-9=0
We add all the numbers together, and all the variables
7c-14=0
We move all terms containing c to the left, all other terms to the right
7c=14
c=14/7
c=2
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