The ages of two person differ by 20 years. If 5 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

Rationale: "let their ages be x and ( x + 20 ) years . then , 5 ( x - 5 ) = ( x + 20 - 5 ) = > 4 x = 40 = > x = 10 their present ages are 30 years and 10 year . answer : a"
Answer: A