-9=4+n

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Solution for -9=4+n equation: 



-9=4+n

We move all terms to the left:

-9-(4+n)=0

We add all the numbers together, and all the variables

-(n+4)-9=0

We get rid of parentheses

-n-4-9=0

We add all the numbers together, and all the variables

-1n-13=0

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

-n=13

n=13/-1

n=-13

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