Question

The sum of the two digits of a 2-digit number is 9. When the digits are reversed, the number decreases by 9. Find the original number.​

Answer 1

Answer:

The correct answer is 45

Answer 2

Answer:

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 solve

x+y=9

x-y=1

-------

2x=10

x=5

y=4

noe thenumber is 10*(5)+4=50+4=54