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0.4c-1.4=2.04
We move all terms to the left:
0.4c-1.4-(2.04)=0
We add all the numbers together, and all the variables
0.4c-3.44=0
We move all terms containing c to the left, all other terms to the right
0.4c=3.44
c=3.44/0.4
c=8+0.24/0.4
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