Graph -1<9+n<17

$- 1 < 9 + n < 17$

Subtract $9$ from each section of the inequality because it does not contain the variable we are trying to solve for.

$- 1 - 9 < n < 17 - 9$

Subtract $9$ from $- 1$ .

$- 10 < n < 17 - 9$

Subtract $9$ from $17$ .

$- 10 < n < 8$