-9n=-7n-2n

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Solution for -9n=-7n-2n equation: 



-9n=-7n-2n

We move all terms to the left:

-9n-(-7n-2n)=0

We add all the numbers together, and all the variables

-9n-(-9n)=0

We get rid of parentheses

-9n+9n=0

We add all the numbers together, and all the variables

=0

n=0/1

n=0

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