12=-n+9

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Solution for 12=-n+9 equation: 



12=-n+9

We move all terms to the left:

12-(-n+9)=0

We add all the numbers together, and all the variables

-(-1n+9)+12=0

We get rid of parentheses

1n-9+12=0

We add all the numbers together, and all the variables

n+3=0

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

n=-3

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