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0.666666667c-4=-16
We move all terms to the left:
0.666666667c-4-(-16)=0
We add all the numbers together, and all the variables
0.666666667c+12=0
We move all terms containing c to the left, all other terms to the right
0.666666667c=-12
c=-12/0.666666667
c=-17+0.666666661/0.666666667
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