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11.87-19.5c-5.69=-16.4c+2.15
We move all terms to the left:
11.87-19.5c-5.69-(-16.4c+2.15)=0
We add all the numbers together, and all the variables
-19.5c-(-16.4c+2.15)+6.18=0
We get rid of parentheses
-19.5c+16.4c-2.15+6.18=0
We add all the numbers together, and all the variables
-3.1c+4.03=0
We move all terms containing c to the left, all other terms to the right
-3.1c=-4.03
c=-4.03/-3.1
c=1+0.93/3.1
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