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-3(14-10c)+12c=42c-42
We move all terms to the left:
-3(14-10c)+12c-(42c-42)=0
We add all the numbers together, and all the variables
-3(-10c+14)+12c-(42c-42)=0
We add all the numbers together, and all the variables
12c-3(-10c+14)-(42c-42)=0
We multiply parentheses
12c+30c-(42c-42)-42=0
We get rid of parentheses
12c+30c-42c+42-42=0
We add all the numbers together, and all the variables
=0
c=0/1
c=0
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