The ratio of the present age of Sandy to that of Molly is 9:2. Eight years from now, the ratio of the ages of Sandy to Molly will be 5:2. What was Sandy's age 6 years ago? Pick:	A) 18	B) 21	C) 24	D) 27	E) 30
Let the present age of Sandy be 9x years and that of Molly be 2x years.   (9x + 8) / (2x + 8) = 5 / 2   8x = 24   x = 3   Six years ago, Sandy's age was 9(3) - 6 = 21   The answer is 21.
<result>B</result>
The ratio of the present age of Sandy to that of Molly is 9:2. Eight years from now, the ratio of the ages of Sandy to Molly will be 5:2. What was Sandy's age 6 years ago?