the sum of the digits of a two digit numberis 7.the number obtained by interchanging the digit exceeds the orignal no by 27. find the no . plz reply
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Let xy be a two-digit number such that x+y=7 yx=xy+27 x+y=7 10y+x=10x+y+27 x+y=7 -9x+9y=27 x+y=7 x-y=-3 x=2 y=5 The number is 25. xy+27=yx 25+27=52
MalikYashodev:
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