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12.13=c+2.48
We move all terms to the left:
12.13-(c+2.48)=0
We get rid of parentheses
-c-2.48+12.13=0
We add all the numbers together, and all the variables
-1c+9.65=0
We move all terms containing c to the left, all other terms to the right
-c=-9.65
c=-9.65/-1
c=9+0.65/1
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