Question

Rahul is 5 years old .his father's age is 31 years after how many years will his father's age be 3 times of his age?​

Answer 1

8 years.

Explanation:

let after x years father's age is 3 times that of Rahul.

31+x=3(5+x)

31+x=15+3x

31-15=3x-x

2x=16

x=16/2=8

Answer 2

8 yrs

Explanation:

3(5+x)=31+x

15+3x=31+x

2x=16

x=2