Question

Arnav father is 49 year old He is nine year older than four time Arnav age

Answer 1

Arnav's age is 10years

Answer 2

Let Arnav age be x.

Therefore , according to question :
4x + 9 = 49
4x = 49-9
4x = 40
x = 40/4
x = 10

Arnav's age = 10 years