Aman is six time as his son. twenty years later, the man will be twice as old as his son. find the age of the man when his son was born.

Let the Present Age of his Son be : S

Given the Man is Six times as his Son

⇒ The Present of Age Man is : 6S

Twenty Years Later :

⇒ The Age of his Son will be : S + 20

⇒ The Age of the Man is : 6S + 20

Given : After 20 years, The Man will be Twice as old as his Son

⇒ 2(S + 20) = 6S + 20

⇒ 2S + 40 = 6S + 20

⇒ 4S = 20

⇒ S = 5

⇒ The Present Age of his Son is : 5

⇒ The Present Age of the Man is : 6S = 6 × 5 = 30

⇒ The Age of Man when his Son was Born is 30 - 5 = 25 years

well if he bought them at 5 cedis each sold them at 7 cedis each then he would make a profit of 2 cedis of each book. if in total he made 150 cedis profit that means he sold 75 books. he lost 12 books at the start so that means he originally bought a total of 82 books.

step-by-step explanation: