Let’s solve your equation step by step
In-2I=1
Solve Absolute Value. In-2I=1
We know either n-2=1 OR n-2=-1
n-2=1 (possibility 1)
n-2+2=1+2 ( Add 2 to both sides)
N=3 first answer
n-2=-1 ( possibility 2)
n-2+2=-1+2 ( Add 2 to both sides)
N=1 second answer
It’s either N=3 OR N=1
I hope that helped