Question

A father is now three times as old as his son. Five years back, he was four times as old as his son. Tha ge of the son in years is

Answer 1

present age

son= x

father= 3x

five years before

son= x-5

father= 3x-5

but father was four times the sons age

therefore, 4(x-5)

4(x-5)= 3x-5

4x-20=3x-5

4x-3x=-5 +20

1x=15

therefore sons present age is 15years