Five years ago a man was seven times as old as his son. Finve years hence, the father will be three times as old as his son. Find their present ges.
Five years ago let the age of son was 
years
Five years ago the age of man was 
years
After five years the age of son is 
years
After five years the the age of man is 
years
According to the question:
Five years hence, the relation in their ages is:
Therefore present age of man is 
years
Present age of son is 
years
13