sum of digits of a two digit number is 9 when the digits are interchanged the new number is greater than the original number by 9 find the original number
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Answer:
The the two digits be x and y.
Given,
10x + y = 9. --------(1)
10y + x - 10x + y = 9. ----------(2)
11y - 9x = 45
hence the two digits number is 45.
Check,
4+5=9
54-45=9
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sum of digits of a two digit number is 9 when the digits are interchanged the new number is greater than the original number by 9 find the original number
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