7c-7=3c+9

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Solution for 7c-7=3c+9 equation: 



7c-7=3c+9

We move all terms to the left:

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

We get rid of parentheses

7c-3c-9-7=0

We add all the numbers together, and all the variables

4c-16=0

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

4c=16

c=16/4

c=4

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