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-2.8c-19.72=-1.1c
We move all terms to the left:
-2.8c-19.72-(-1.1c)=0
We get rid of parentheses
-2.8c+1.1c-19.72=0
We add all the numbers together, and all the variables
-1.7c-19.72=0
We move all terms containing c to the left, all other terms to the right
-1.7c=19.72
c=19.72/-1.7
c=-11+1/1.6666666666667
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