Question

Five years from now Dan's age will be three times the age of his son. Five years ago Dan was seven times as old as his son. What is son's present age?

Answer 1

Explanation:

Lets age of father be x and age of son be y

x+5=3(y+5)

x=3y+15-5

x=3y+10

x-5=7(y-5)

3y+10-5=7(y-5)

3y+5=7y -35

35+5= 7y-3y

40=4y

y=10 years son`s age