Question

The sum of a man and his son is 47 years. After 4 years theageof man will be four times the age of his son. Age of son is

Answer 1

Explanation:

let father= x

son= y

x+y= 47--------------------(1)

after 4 years...

x+4= 4(y+4)

x-4y= 12--------------------(2)

subtract equation 1 from 2

5y= 35

y= 7

father= 40

son = 7