A number is doubled and 5 is added. If the resultant is trebled, it becomes 105. What is that number?	Choices.
A) 9	B) 15	C) 18	D) None of these	E) Cannot be determined
Explanation:   Let the number be x.   Therefore,   3(2x + 5) = 105   6x + 15 = 105   6x = 90   x = 15   ANSWER: 15
<result>B</result>
A number is doubled and 5 is added. If the resultant is trebled, it becomes 105. What is that number?