Question 1141490
son is now x
man's is x+24
three years ago, man was x+24-3=x+21
that is eight years less than his son's age three years from now, which will be x+3
so x+21 is 8 less than x+3
therefor x+21+8=x+3
so x+29 = x+3
this is not true so there is a mistake in the formulation of the problem.

Example: son is 6 man is 30
three years ago, son was 3 and man was 27
the son will be 9 3 years from now.