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4c+2.8=7.2
We move all terms to the left:
4c+2.8-(7.2)=0
We add all the numbers together, and all the variables
4c-4.4=0
We move all terms containing c to the left, all other terms to the right
4c=4.4
c=4.4/4
c=1+0.4/4
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