Answer:

54

Step-by-step explanation:

let the two digit  number be 10x+y

x+y = 9 (given)

let the reversed digits be

10y+x = 10x+y-9

9x-9y=9

x-y=1

now ,

x+y = 9  

x-y=1

2x=10  

x=5  

y=4

now the number is :-

10*5+4

50+4

54

HOPE IT IS CLEAR

THANK YOU .

Answer:

i don't understand question