the sum of the digits of the two digit number is 8. the number obtained by interchanging the digits exceeds the given number by 18 . find the number?
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Step-by-step explanation:
Let the tens digit be x and unit digit be y
Given:
x+y=8 (1)
10y+x=10x+y+18
⇒9y-9x=18
⇒y-x=2 (2)
Adding (1) and (2), we get
2x=10
⇒y=5
substituting x in (2), we get
5-x=2
⇒x=3
as x=3 and y=5, the number is 35
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