If 3^x*4^y = 19,683 and x – y = 9, then x = ? Choose the most appropriate option:
A) 8
B) 9
C) 10
D) 11
E) 12

Rationale: since 19,683 is an odd number , it is not a multiple of 4 . this means that y must equal zero . since x - y = 9 and y = 0 , then x = 9 . the answer is b .
Answer: B