-7n-2n=81

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Solution for -7n-2n=81 equation: 



-7n-2n=81

We move all terms to the left:

-7n-2n-(81)=0

We add all the numbers together, and all the variables

-9n-81=0

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

-9n=81

n=81/-9

n=-9

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