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(C)=0.1^2-7C+140
We move all terms to the left:
(C)-(0.1^2-7C+140)=0
We get rid of parentheses
C+7C-140-0.1^2=0
We add all the numbers together, and all the variables
8C-140.01=0
We move all terms containing C to the left, all other terms to the right
8C=140.01
C=140.01/8
C=17+1/1.9950124688279
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