Sum of the digit of a two number is 7 . When the interchanged the digit ,iris found that the resulting new number is grater than the original number by 27 .Wath is the two digit nuber
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Sum of two digit number=7
Let unit digit be x
Therefore , tens digit=7-x
Original number=10(7-x)+x =70-10x+x = 70-9x
Interchanged number= 10x-(7-x) =10x-7-x =9x-7
ATQ :-
New number = Original number+27
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