7n+2n=84

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Solution for 7n+2n=84 equation: 



7n+2n=84

We move all terms to the left:

7n+2n-(84)=0

We add all the numbers together, and all the variables

9n-84=0

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

9n=84

n=84/9

n=9+1/3

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