a man is four times as old his son five years, Average, General Mathematics

Question:A man is four times as old as his son. Five years ago, the man was nine times as old as his son was at that time. What is the present age of the man?

Answer Let son's age = x.

 Then, man's age = 4x.

 9 (x -5) = (4x - 5)

 or 9x - 45 = 4x - 5

 or 5x = 40

 or x = 8

`:.` Man's present age = 4x = 4 x 8 = 32 years.

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A man is four times as old as his son. Five years ago, the man was nine times as old as his son was at that time. What is the present age of the man?

Question:A man is four times as old as his son. Five years ago, the man was nine times as old as his son was at that time. What is the present age of the man?

Answer Let son's age = x. Then, man's age = 4x. 9 (x -5) = (4x - 5) or 9x - 45 = 4x - 5 or 5x = 40 or x = 8 `:.` Man's present age = 4x = 4 x 8 = 32 years.