The ratio of the present age of Sandy to that of Molly is 9:2. Sixteen years from now, the ratio of the ages of Sandy to Molly will be 5:2. What was Sandy's age 6 years ago? Choose the correct choice
A) 30
B) 36
C) 42
D) 48
E) 54
Let the present age of Sandy be 9x years and that of Molly be 2x years.   (9x + 16) / (2x + 16) = 5 / 2   8x = 48   x = 6   Six years ago, Sandy's age was 9(6) - 6 = 48   The answer is 48.
<result>D</result>
The ratio of the present age of Sandy to that of Molly is 9:2. Sixteen years from now, the ratio of the ages of Sandy to Molly will be 5:2. What was Sandy's age 6 years ago?