Question

Note: Take the digits as x and 9-x​

Answer 1

Step-by-step explanation:

let unit digit be x

ten's digit be 9- x

original numbers= 10 (9 - x ) + x

= 90 - 9x

reverse no. = 10x + 9 - x

=9x + 9

original no. - 27 = reverse no.

90- 9x -27=9x +9

63-9x = 9x + 9

63+9= 9x +9x

72 = 18x

72/18=x

4= x

unit digit = 4

ten's digit = 9-4

=5

therefore, the number is 54