3. Sum of the digits of a two-digit number is 9. When we interchange the digits, it is found that the resulting new number is greater than the original number by 27. What is the two-digit number?
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Step-by-step explanation:
as a per given questions :
10x + (9 - x) =10 (9 - x ) x + 27
9x + 9 = 10x + x + 27
9x + 9 = 117 - 9x
18x =108
x =18/108
x = 6
so the digit in unit place = 6
digit in ten's place is
9 - x
9 - 6 = 3
hence the number = 3
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