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63.8=9c-1
We move all terms to the left:
63.8-(9c-1)=0
We get rid of parentheses
-9c+1+63.8=0
We add all the numbers together, and all the variables
-9c+64.8=0
We move all terms containing c to the left, all other terms to the right
-9c=-64.8
c=-64.8/-9
c=7+1/5
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