9*n+2*n=77

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Solution for 9*n+2*n=77 equation: 



9n+2n=77

We move all terms to the left:

9n+2n-(77)=0

We add all the numbers together, and all the variables

11n-77=0

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

11n=77

n=77/11

n=7

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