Given, ages of two persons differ by 20 years Let the age of two persons be ‘a’ and ‘b’ where ‘a’ is the elder one and ‘b’ is the younger one Thus, a - b = 20 ----(1) Now, 5 years ago, the elder one was 5 times as old as the younger one Thus, a - 5 = 5(b - 5) ⇒ a = 5b - 20 ----(2) Subtracting (1) - (2) 4b = 40 ⇒ b = 10 Thus, a = 30 Ages of the two persons = 30, 10