The sum of the digits of a two digit number is15. The number obtained by interchanging its digits exceeds the given number by 9.
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x+y=15.. 10x+y-10y-x=9... 9x-9y=9. x-y=1...by using elimination method we get y=7... and x=8
shreya228:
actually .. i got it wrong... x-y=1..
y=7 and x =8...
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