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-c/2=4
We move all terms to the left:
-c/2-(4)=0
We multiply all the terms by the denominator
-c-4*2=0
We add all the numbers together, and all the variables
-1c-8=0
We move all terms containing c to the left, all other terms to the right
-c=8
c=8/-1
c=-8
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