Question

The sum of the digits of a 2- digit number is 9 . On reversing its digit , the new number obtained is 45 more then the original number. Find the number.

Answer 1

$x + y = 9 \\ y + x = (10x + y) + 45$
solve these equations

Answer 2

they ask the two digit number
if we add 27. then 2+7=9
when reversing it becomes 72
if 72-27=45
so the answer is 27
Ihope it is the answer
27 :- 2+7=9
72 :- 72-27=45