I used multisim but I could not figure out how to input inductance to give me the correct 9 v on the right side of the problem. Also when it says k=0 i'm really lost on that.

I did 12*.47nH which gave me 5.64 V

I then subtracted 9-5.64v and got 3.36 V

I am lost at this point not sure if i need to do 3.36 x voltage remaining to find missing resistance.

Thanks