9-5n+2n=15-81

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Solution for 9-5n+2n=15-81 equation: 



9-5n+2n=15-81

We move all terms to the left:

9-5n+2n-(15-81)=0

We add all the numbers together, and all the variables

-5n+2n+9-(-66)=0

We add all the numbers together, and all the variables

-3n+75=0

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

-3n=-75

n=-75/-3

n=+25

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