Question

please answer fast ​

Answer 1

Answer:

y is 9

Explanation:

digit at ten = x

unit = y

original number 10x + y

inter change 10y +x

x+y =17 ...... 1

10x +y +9 =10y +x

9x -9y= -9

x-y = -1 .....2

divide both sides with 9 adding 1 and 2

x+y =17

x-y =-1

2x=16

x =8

put x=8 in equation 1

8+y = 17

y =9

therefore original number is 89

Hope this answer will help you ........