The ratio of the ages of three people is 4:6:7. Six years ago, the sum of their ages was 67. Find their present ages.	Pick one:
A) 12,18,21
B) 16,24,28
C) 20,30,35
D) 24,36,42
E) 28,42,49
Let the present ages be 4x, 6x, 7x.   (4x-6) + (6x-6) + (7x-6) = 67   17x = 85   x = 5   Their present ages are 20, 30, and 35.   The answer is 20,30,35.
<result>C</result>
The ratio of the ages of three people is 4:6:7. Six years ago, the sum of their ages was 67. Find their present ages.