Question

If father is three times as old as son. 5 years ago he was 4 times age of his son what is son age

Answer 1

Let son's age be x

Now form the equation according to given clues

if father is 3 times older than son =3x

5 years ago:

son=(x-5)

father=4(3x-5)

on equating both ages we get,

(x-5)=4 (3x-5)

x-5=12x-20

-5+20=12x-x

15=11x

x=15/11