Question

Sum of the two digits of 2-digit number is 9. If the digits are reversed, the new number

so formed decrease by 45. Find the number.​

Answer 1

Answer:

Step-by-step explanation:

Let the number be xy

x+y=9

10*x+y-45= 10*y+x

9x-9y=45

x-y=5

x=7

y=2

Number is 72

Answer 2

Step-by-step explanation:

let the no. is xy

x+y=2

10*x+ y-=45

9x-9y =45

x-y=5

x,=7

y =2

no.is 72