A number is doubled and 9 is added. If resultant is trebled, it becomes 75. What is that number	Choose the correct option.
A) 8  B) 10  C) 12  D) 14  E) 15

Rationale: "explanation : = > 3 ( 2 x + 9 ) = 75 = > 2 x + 9 = 25 = > x = 8 answer : option a"
Answer: A