A number is doubled and 5 is added. If the resultant is trebled, it becomes 129. What is that number?
Options
A) 12
B) 29
C) 27
D) 19
E) 99

Rationale: explanation : let the number be x . therefore , 3 ( 2 x + 5 ) = 129 6 x + 15 = 129 6 x = 114 x = 19 answer : d
Answer: D