n+72=9n

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Solution for n+72=9n equation: 



n+72=9n

We move all terms to the left:

n+72-(9n)=0

We add all the numbers together, and all the variables

-8n+72=0

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

-8n=-72

n=-72/-8

n=+9

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