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c=15.00+0.07(20)
We move all terms to the left:
c-(15.00+0.07(20))=0
We add all the numbers together, and all the variables
c-(15.072)=0
We add all the numbers together, and all the variables
c-15.072=0
We move all terms containing c to the left, all other terms to the right
c=15.072
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