9=n-7+n

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Solution for 9=n-7+n equation: 



9=n-7+n

We move all terms to the left:

9-(n-7+n)=0

We add all the numbers together, and all the variables

-(2n-7)+9=0

We get rid of parentheses

-2n+7+9=0

We add all the numbers together, and all the variables

-2n+16=0

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

-2n=-16

n=-16/-2

n=+8

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