9-n=7.

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Solution for 9-n=7. equation: 



9-n=7.

We move all terms to the left:

9-n-(7.)=0

We add all the numbers together, and all the variables

-n+9-7=0

We add all the numbers together, and all the variables

-1n+2=0

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

-n=-2

n=-2/-1

n=+2

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