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-4c=-2c-8
We move all terms to the left:
-4c-(-2c-8)=0
We get rid of parentheses
-4c+2c+8=0
We add all the numbers together, and all the variables
-2c+8=0
We move all terms containing c to the left, all other terms to the right
-2c=-8
c=-8/-2
c=+4
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