SOLUTION: The product of digits of a two digit number is 12.when 9 is added to the number, the digits interchange their places. Determine the number

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Question 904035: The product of digits of a two digit number is 12.when 9 is added to the number, the digits interchange their places. Determine the number
Answer by Edwin McCravy(20056) About Me  (Show Source):
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The product of digits of a two digit number is 12.
That narrows it down to 26, 62, 34, or 43

when 9 is added to the number, the digits interchange their places. 
26+9=35, 62+9=71, 34+9=43, 43+9=52

Only 34 interchanged the digits to 43 when 9 was added, 
so the answer is 39

Edwin