9=-1/n-1

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Solution for 9=-1/n-1 equation: 



9=-1/n-1

We move all terms to the left:

9-(-1/n-1)=0



Domain of the equation: n-1)!=0

n∈R



We get rid of parentheses

1/n+1+9=0

We multiply all the terms by the denominator


1*n+9*n+1=0

We add all the numbers together, and all the variables

10n+1=0

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

10n=-1

n=-1/10

n=-1/10

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