Math problem: The sum of the ages of Xiaoyun and his father is 53 years old. Xiaoyun is four times older than his father, two years older. What is the age difference between Xiaoyun and his father?
Solution: Let Xiaoyun be X years old and his father be (4x-2) years old.
x+(4x-2)=53
x= 1 1
(4x-2)=42 years old
42- 1 1=3 1 year
A: Xiaoyun 1 1 years old, and his father is 42 years old. The age difference between Xiaoyun and his father is 3 1 year.