9-3n=3n-9

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Solution for 9-3n=3n-9 equation: 



9-3n=3n-9

We move all terms to the left:

9-3n-(3n-9)=0

We get rid of parentheses

-3n-3n+9+9=0

We add all the numbers together, and all the variables

-6n+18=0

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

-6n=-18

n=-18/-6

n=+3

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