The ages of two person differ by 20 years. If 4 years ago, the elder one be 5 times as old as the younger one, their present ages(in years) are respectively Choose the correct choice from the following choices.
A) 30, 10  B) 25, 5  C) 29, 9  D) 50, 30  E) 20,10
Let their ages be x and (x + 20) years.   Then, 5(x - 4) = (x + 20 - 4)   =&gt; 4x = 36   =&gt;x =9   Their present ages are 29 years and 9 year.   ANSWER:29, 9
<result>C</result>
The ages of two person differ by 20 years. If 4 years ago, the elder one be 5 times as old as the younger one, their present ages(in years) are respectively