3x=(28-4)+x

The solution is x= 12.

So in 2002, my son's age was 12 years old.

Therefore, 2002-12+1=1991.

A: My son was born in 199 1.

Indeed, the father is 24 years older than his son. When the father's age is three times that of his son, that is, the father is 24 years older than his son, and the "age difference" of 24 years old is twice that of his son, then 24 divided by 2 equals 12, and 12 is the son's age.

According to mathematical theory, the age of the child in 2002 is 12. If the child is subtracted from 12 in 2002, it is equal to 1990, then the child was born in 1990. However, if the age is calculated by year, it is said that the child born in 1990 was in 2002.

Don't move the contents of the book too rigidly, but think about it from reality! Just like the container used to hold things, the last thing can't hold half a container, but it needs a container, so it can't be rounded mathematically! ?