The present ages of three persons are in proportions 4:7:9. Seven years ago, the sum of their ages was 79. Find their present ages.	Choose the correct choice from the following choices:
A) 20, 28  B) 28, 36  C) 35, 45  D) 35, 55  E) of these
Let their present ages be 4x, 7x and 9x years respectively.   Then, (4x - 7) + (7x - 7) + (9x - 7) = 79   20x = 100 =&gt; x = 5   Their present ages are 20, 35 and 45 years respectively.   ANSWER:35, 45
<result>C</result>
The present ages of three persons are in proportions 4:7:9. Seven years ago, the sum of their ages was 79. Find their present ages.