-30=-9+n

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Solution for -30=-9+n equation: 



-30=-9+n

We move all terms to the left:

-30-(-9+n)=0

We add all the numbers together, and all the variables

-(n-9)-30=0

We get rid of parentheses

-n+9-30=0

We add all the numbers together, and all the variables

-1n-21=0

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

-n=21

n=21/-1

n=-21

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