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-30=8c+2
We move all terms to the left:
-30-(8c+2)=0
We get rid of parentheses
-8c-2-30=0
We add all the numbers together, and all the variables
-8c-32=0
We move all terms containing c to the left, all other terms to the right
-8c=32
c=32/-8
c=-4
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