A number is doubled and 5 is added. If the resultant is trebled, it becomes 105. What is that number?	Choose the correct answer.
A) 12
B) 29
C) 27
D) 15
E) 99

Rationale: "explanation : let the number be x . therefore , 3 ( 2 x + 5 ) = 105 6 x + 15 = 105 6 x = 90 x = 15 answer : d"
Answer: D