Let the digits at unit’s place be a and ten’s place be v, respectively. Thus, the number we need to find is
As per the given question, the sum of the two digit number is
Upon interchanging the digit’s place, the new number will be
It is also given that, the new number obtained exceeds from the original number by
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On solving equation (i) and (ii), we can find value of a and b.
Now, adding the equations (i) and (ii), we get;
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Putting the value of a in the equation (i), we get value of b
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Hence, the required number is,