Sandy is younger than Molly by 16 years. If the ratio of their ages is 7:9, how old is Sandy?	Pick one: A) 42 B) 49 C) 56 D) 63 E) 70
Let Sandy's age be 7x and let Molly's age be 9x.   9x - 7x = 16   x = 8   Sandy is 56 years old.   The answer is 56.
<result>C</result>
Sandy is younger than Molly by 16 years. If the ratio of their ages is 7:9, how old is Sandy?