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6.68=2.3c+0.7
We move all terms to the left:
6.68-(2.3c+0.7)=0
We get rid of parentheses
-2.3c-0.7+6.68=0
We add all the numbers together, and all the variables
-2.3c+5.98=0
We move all terms containing c to the left, all other terms to the right
-2.3c=-5.98
c=-5.98/-2.3
c=2+1/1.6666666666667
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