9n+2n=99

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Solution for 9n+2n=99 equation: 



9n+2n=99

We move all terms to the left:

9n+2n-(99)=0

We add all the numbers together, and all the variables

11n-99=0

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

11n=99

n=99/11

n=9

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