A number is doubled and 9 is added. If resultant is trebled, it becomes 69. What is that number
Choose the correct option:  A) 7  B) 10  C) 12  D) 14  E) 15

Rationale: "explanation : = > 3 ( 2 x + 9 ) = 69 = > 2 x + 9 = 23 = > x = 7 answer : option a"
Answer: A