A father's number age is 3 times the sum of the ages of his 2 children.After 5 years, his age will b

A father's number age is 3 times the sum of the ages of his 2 children.After 5 years, his age will be 2 times the sum of their ages.Find the present age of the father(CBSE PYQS MATHS CLASS 10TH, most important)