3c-9=9c+9

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



3c-9=9c+9

We move all terms to the left:

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

We get rid of parentheses

3c-9c-9-9=0

We add all the numbers together, and all the variables

-6c-18=0

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

-6c=18

c=18/-6

c=-3

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