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12.2=9c-4
We move all terms to the left:
12.2-(9c-4)=0
We get rid of parentheses
-9c+4+12.2=0
We add all the numbers together, and all the variables
-9c+16.2=0
We move all terms containing c to the left, all other terms to the right
-9c=-16.2
c=-16.2/-9
c=1+6/7.5
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