A father is nine times as old as his son and the mother is eight times

Linear Equations

A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the father's and the mother's age is 51 years. What is the age of the son?

  1. 3 years
  2. 4 years
  3. 7 years
  4. 5 years

Answer

Let age of son be x.

Father's age = 9x and Mother's age = 8x

9x + 8x = 51

x = 3

The correct option is A.