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-2.7c-15=-0.9c+12.9
We move all terms to the left:
-2.7c-15-(-0.9c+12.9)=0
We get rid of parentheses
-2.7c+0.9c-12.9-15=0
We add all the numbers together, and all the variables
-1.8c-27.9=0
We move all terms containing c to the left, all other terms to the right
-1.8c=27.9
c=27.9/-1.8
c=-15+0.9/1.8
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