Question 571513
let the two numbers be x and y

as per 1st condition;
x-y = 9 .....(1)

as per 2nd condition;
2x = 5y
or x = 5y/2........(2)

put the value of 'x' from (2) into (1)and we get
(5y/2) + y = 9
solve the equation and we get
y = 6

put the value of y in (1) and we get
x= 15

hope this will help you