Let the present ages of the father as a years and that of his son’s age as b years.

According to question

After 6 years, the man’s age will be years and son’s age will be years.

So, the equation is

……. (i)

Also again from the question it’s given as,

Before 3 years, the age of the man was years and the age of son’s was years.

Furthermore, the relation between their 3 years ago is given below

……. (ii)

Therefore, by solving (i) and (ii), we get the  solution

Using cross-multiplication, we get

  ,

⇒,

Hence, the present age of the man is 30 bears and the present age of son is 6 bears.