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Question 95163This question is from textbook
: The sum of the digits of a two digit number is 12. The tens digit is three times the ones digit. What is the number ? Thank you
This question is from textbook
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The sum of the digits of a two digit number is 12. The tens digit is three times the ones digit. What is the number ?
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Comment: Any two digit number can be written as 10t+u where t is the tens
digit and u is the units digit.
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EQUATIONS:
t+u=12
t = 3u
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Substitute t=3u into the 1st equation and solve for "u".
3u+u=12
4u = 12
u = 3
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Substitute that into t+u=12 to solve for "t".
t+3 = 12
t = 9
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The number is 93
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Cheers,
Stan H.
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Cheers,
Stan H.
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