If (5^11)(9^6)=3(15^x), what is the value of x?	Choose the correct choice from the following choices:
A) 7
B) 9
C) 11
D) 13
E) 15

Rationale: "( 5 ^ 11 ) ( 9 ^ 6 ) = 3 ( 15 ^ x ) = > 5 ^ 11 * 3 ^ 12 = 3 * 3 ^ x * 5 ^ x = > 5 ^ 11 * 3 ^ 12 = 3 ^ ( x + 1 ) * 5 ^ x value of x = 11 answer c"
Answer: C