7c-12=30

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Solution for 7c-12=30 equation: 



7c-12=30

We move all terms to the left:

7c-12-(30)=0

We add all the numbers together, and all the variables

7c-42=0

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

7c=42

c=42/7

c=6

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