3(7c-7)-9=12

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Solution for 3(7c-7)-9=12 equation: 



3(7c-7)-9=12

We move all terms to the left:

3(7c-7)-9-(12)=0

We add all the numbers together, and all the variables

3(7c-7)-21=0

We multiply parentheses

21c-21-21=0

We add all the numbers together, and all the variables

21c-42=0

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

21c=42

c=42/21

c=2

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