Question

the difference of the digits of a 2 digit number is 3.If the digits are interchanged and the new number is added to the original number ,the result is 77.Find the original number .

Answer 1

x-y=3 now the 2 digit no. is 10x+y so as condition 10x+y+10y+X=77 after solving it we find x+y=7 now evaluate bother equation we can find that X=5 and y=2 so no. is 52
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