A number is doubled and 9 is added. If the resultant is trebled, it becomes 69. What is that number?	Pick: A) 3.5 B) 6 C) 8 D) 7 E) 4

Rationale: "let the number be x . then , 3 ( 2 x + 9 ) = 69 2 x = 14 = > x = 7 answer : d"
Answer: D