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Yatsu 發問於 科學及數學數學 · 1 十年前

f.1 maths

Last year,Mr.Lee was three times as old as his daughter and 26 years older than her.How old is Mr.Lee now?

solution:

Let x be his daughter's age in last year.

______-______=______

......

更新:

The first column must be ______-______=______

1 個解答

評分
  • 1 十年前
    最愛解答

    Solution:

    Let x be his daughter's age last year.

    From the given condition,

    3x = x + 26

    2x = 26

    x = 13

    So, age of Mr. Lee last year = 13 + 26 = 39

    So, Mr. Lee is 39 + 1 = 40 years old this year.

    2007-08-02 14:28:30 補充:

    3x - (x 26) = 02x = 26x = 13

    資料來源: Myself~~~
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