2n+9=n-4

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Solution for 2n+9=n-4 equation: 



2n+9=n-4

We move all terms to the left:

2n+9-(n-4)=0

We get rid of parentheses

2n-n+4+9=0

We add all the numbers together, and all the variables

n+13=0

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

n=-13

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