A number is doubled and 5 is added. If the resultant is trebled, it becomes 117. What is that number?  Choose the correct answer
A) 12	B) 29	C) 27	D) 17	E) 99

Rationale: "explanation : let the number be x . therefore , 3 ( 2 x + 5 ) = 117 6 x + 15 = 117 6 x = 102 x = 17 answer : d"
Answer: D