Question

5 yrs ago a man was 7 times as old as his son. 5 yrs hence the father will 3 times as old as his son . what is present age of son

Answer 1

Answer:

10 years old

Step-by-step explanation:

let, present age of son be x and present age of Father be y.

5 years ago, (y-5) = 7(x-5)

5 years later, (y+5) = 3(x+5)

subtract eq. 2 from eq. 1

y - 5 - y - 5 = 7x - 35 - 3x -15

-10 = 4x - 50

4x = 40

x = 10

present age of son is 10 years.