A number is doubled and 9 is added. If the resultant is trebled, it becomes 81. What is that number?  Answers.
A) 3.5 B) 6 C) 8 D) 7 E) 9

Rationale: "let the number be x . then , 3 ( 2 x + 9 ) = 81 2 x = 18 = > x = 9 answer : e"
Answer: E