-9+9n=9n-9

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



-9+9n=9n-9

We move all terms to the left:

-9+9n-(9n-9)=0

We get rid of parentheses

9n-9n+9-9=0

We add all the numbers together, and all the variables

=0

n=0/1

n=0

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