3c-12=78

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Solution for 3c-12=78 equation: 



3c-12=78

We move all terms to the left:

3c-12-(78)=0

We add all the numbers together, and all the variables

3c-90=0

We move all terms containing c to the left, all other terms to the right

3c=90

c=90/3

c=30

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