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-12(12-3c)=-66
We move all terms to the left:
-12(12-3c)-(-66)=0
We add all the numbers together, and all the variables
-12(-3c+12)-(-66)=0
We add all the numbers together, and all the variables
-12(-3c+12)+66=0
We multiply parentheses
36c-144+66=0
We add all the numbers together, and all the variables
36c-78=0
We move all terms containing c to the left, all other terms to the right
36c=78
c=78/36
c=2+1/6
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