the sum of the digits of the two digit number is 15.the number obtained by interchanging its digits exceeds the given number by 9. find the original number.

* hii!*

*Let the number be 10x+y*

*The sum: x+y=15...(1)*

*second : 10x+y= 10y+x+9*

*y-x=1...(2)*

*Solving both the equations (1) and (2)*

*Y=8 and X=7*

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