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| Math Central | Quandaries & Queries |
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Subject: linear equations I have found an answer for this just by going through what two numbers can equal 13, but I would like to know how to do it with linear equations... "The sum of the digits of a two-digit number is 13. If the digits are reversed, the new number is 9 more than the original number. Find the original number." Thank you in advance. |
Hi Liz,
If the units digit of the number is b and the tens digit is a then the number is 10 a + b.
Does this help?
Penny
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