Form 3 maths (urgent)
2009-08-31 9:48 pm
A number consists of two digits whose sum is 9. The units digit is one less than 4 times the tens digit. Find the number Ans:27
回答 (1)
2009-08-31 9:53 pm
✔ 最佳答案
Let the units digit and the tens digit be x and 4x-1.x+(4x-1)=9
5x=10
x=2
∴The number = 27
收錄日期: 2021-04-23 20:43:54
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https://hk.answers.yahoo.com/question/index?qid=20090831000051KK01001