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54=12+8c
We move all terms to the left:
54-(12+8c)=0
We add all the numbers together, and all the variables
-(8c+12)+54=0
We get rid of parentheses
-8c-12+54=0
We add all the numbers together, and all the variables
-8c+42=0
We move all terms containing c to the left, all other terms to the right
-8c=-42
c=-42/-8
c=5+1/4
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