Question

Five years ago, father's age was 5 times as old as his son and after 3 years he will be 3 times as old as his son. find their present ages.

Answer 1

let fathers age be x
and sons age y
5year ago
x-5=(y-5)5
2nd equation
x+3=(y+3)3
on solving we get
y=13
x=45