A number is doubled and 6 is added. If resultant is trebled, it becomes 72. What is that number	Choose the correct choice from the following choices: A) 8 B) 10 C) 9 D) 14 E) 16

Rationale: "explanation : = > 3 ( 2 x + 6 ) = 72 = > 2 x + 6 = 24 = > x = 9 option c"
Answer: C