A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number?
Choices.
A) 3.5 B) 6 C) 8 D) None of these E) Cannot be determined
Solution   Let the number be x.   Then, 3(2x + 9)	‹=› 75   ‹=› 2x+9 = 25   ‹=› 2x= 16   x= 8.   Answer 8
<result>C</result>
A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number?