If 3^x*4^y = 531,441 and x – y = 12, then x = ?	Answers
A) 10 B) 11 C) 12 D) 13 E) 14

Rationale: "since 531,441 is an odd number , it is not a multiple of 4 . this means that y must equal zero . since x - y = 12 and y = 0 , then x = 12 . the answer is c ."
Answer: C