A number is doubled and 15 is added. If the resultant is multiplied by 5, it becomes 125. What is that number?
Choose the correct option.
A) 5
B) 10
C) 8
D) None of these
E) Cannot be determined
Solution   Let the number be x.   Then, 5(2x + 15) ‹=› 125   ‹=› 2x+15 = 25   ‹=› 2x= 10   x= 5.   Answer None of these
<result>D</result>
A number is doubled and 15 is added. If the resultant is multiplied by 5, it becomes 125. What is that number?