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7.70c=5.5
We move all terms to the left:
7.70c-(5.5)=0
We add all the numbers together, and all the variables
7.70c-5.5=0
We move all terms containing c to the left, all other terms to the right
7.70c=5.5
c=5.5/7.70
c=3.6666666666667/5.1333333333333
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