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10c=39.9
We move all terms to the left:
10c-(39.9)=0
We add all the numbers together, and all the variables
10c-39.9=0
We move all terms containing c to the left, all other terms to the right
10c=39.9
c=39.9/10
c=3+5.2105263157895/5.2631578947368
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