I think there is information missing.
I got X^y= 38 so X cannot be ..........more than one option
i got n = 64 which means that x could be 2, 4, or 8.
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993