SOLUTION: If two digit number ten's digit is three times The ones digit if digit is interchange The new number is 36 less than The original number.find The number

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Question 1101397: If two digit number ten's digit is three times The ones digit if digit is interchange The new number is 36 less than The original number.find The number
Answer by josgarithmetic(39630) About Me  (Show Source):
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If a two-digit number's tens digit is three times the ones digit, and if the digits are interchanged, then the new number is 36 less than the original number.
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t, TENS
u, ONES
t=3u---------------from this the possible numbers come from 31, 62, 93; but none others.

10t%2Bu-%28t%2B10u%29=36
-
9t-9u=36
t-u=4
substitute;
3u-u=4
2u=4
u=2
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Original Number: 62