A father is 9 times as old as his son. In three years, the father will be \(6\) times as old as his son. How old is the son?
Let father's age be 9v, son's age be v.
9v + 3 = 6(v + 3)
9v + 3 = 6v + 18
3v = 15
v = 5
Father; 45, Son: 5.
