Question

A number consists of two digits whose sum is 9. If 27 is subtracted from the number,its digit are reversed.find the number

Answer 1

Answer:

let us number be 10x+y

Step-by-step explanation:

according to the question :

x + y=9..... this is equation one

10x+y+27 = 10y+x

10x+y-10y-x =-27 ...... divide this equation by 9

x - y =-3....... this is equation

x+y=9

_____

x-y=-3

-y and +y are cancelled.

so x=3,y=6 required = 10 x 3+6=36