Question

the age difference between eldest
and youngest is equal to the youngest find the age of all if the youngest is 36 year old and the ratio of eldest and youngest is 9 ratio 5

Answer 1

9x -5x=36
because the difference between eldest and youngest is equal to the sge of youngest.
4x=36
x=36/4=9
age of eldest =9x=9×9=81
age of youngest=5x=5×9=45

Answer 2

9x - 5x = 36

Because the diffrence between the eldest and youngest is equal to the age of youngest.
4x = 36
x = 36/4 = 9

Age of Eldest = 9x = 9*9 = 81.
Age of Youngest = 5x = 5*9 = 45.