The ages of two person differ by 20 years. If 7 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.
A) 30, 10
B) 32, 12
C) 29, 9
D) 50, 30
E) 20,10
Let their ages be x and (x + 20) years.   Then, 5(x - 7) = (x + 20 - 7)   =&gt; 4x = 48   =&gt;x =12   Their present ages are 32 years and 12 year.   ANSWER:32, 12
<result>B</result>
The ages of two person differ by 20 years. If 7 years ago, the elder one be 5 times as old as the younger one, their present ages(in years) are respectively