-n+9-2n-1=-1

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Solution for -n+9-2n-1=-1 equation: 



-n+9-2n-1=-1

We move all terms to the left:

-n+9-2n-1-(-1)=0

We add all the numbers together, and all the variables

-3n+9=0

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

-3n=-9

n=-9/-3

n=+3

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