The ages of two person differ by 12 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 one:
A) 30 , 10
B) 25 , 5
C) 29 , 9
D) 50 , 30
E) 20 , 8

Rationale: "let their ages be x and ( x + 12 ) years . then , 5 ( x - 5 ) = ( x + 12 - 5 ) = > 4 x = 32 = > x = 8 their present ages are 20 years and 8 year . answer : e"
Answer: E