two digit number is 4 times the sum of its digits if 18 is added to the number the new number obtained is that by interchanging the digits of the original number find the number
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Answer:
Let the tens and unit digit of number are =x,y respectively
First condition :
⇒10x+y=4(x+y)⇒2x=y
Second condition :
⇒10x+y+18=10y+x
⇒x−y=−2
⇒x−2x=−2
⇒x=2
⇒y=4
two digit number =24
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