Son's age this year: 8-4=4(8 years old)
Now the father's age: 4+24=28 (years old)
A: My father is 28 years old and my son is 4 years old.
This is a problem in the Olympic era. Think about solving problems:
Everyone's age is 1 year, and the age difference remains the same. "After four years, the father is four times older than his son" means that after four years, the father is (4- 1) times older than his son. "The father is 24 years older than his son" remains unchanged. So 24÷(4- 1)=(8 years old), that is, the multiple of 1 is 8 years old-the age of the son.
I hope I can help you!