母年33歲,女3歲,問多少年後,母年是女年的6倍?
回答 (8)
2008-01-26 11:54 pm
3年後,母年是女年的6倍
2008-01-26 9:17 pm
33+a over 3+a = 6
33+a = 18+6a
15 = 5a
3 = a
Ans is 3
33+a = 18+6a
15 = 5a
3 = a
Ans is 3
2008-01-26 8:54 pm
3年!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
2008-01-26 6:54 am
設X/Y/Z(中學最常用的代數符號)年後,母年是女年的6倍。(我地依家就用Y做代數符號)
(33+Y)÷(3+Y)=6
33+Y=18+6Y
5Y=15
Y=3
答案係:所以3年後，母年是女年的6倍。
(33+Y)÷(3+Y)=6
33+Y=18+6Y
5Y=15
Y=3
答案係:所以3年後，母年是女年的6倍。
2008-01-26 3:14 am
after 3 years
2008-01-25 19:44:20 補充：
3,33 and 6 are all 3's multiples,so the anwser must be 3 or it's multiples.if a is the daughter's age,b is the mum's age,and c is the anwser,you can try each anwser.ifc=3,then3 3=6,and33 3=36,and 6 times 6=36,so,the anwser is 3.
2008-01-25 19:44:20 補充：
3,33 and 6 are all 3's multiples,so the anwser must be 3 or it's multiples.if a is the daughter's age,b is the mum's age,and c is the anwser,you can try each anwser.ifc=3,then3 3=6,and33 3=36,and 6 times 6=36,so,the anwser is 3.
2008-01-26 3:13 am
設：a年後，母年是女年的6倍，
得：33+a=6 (3+a)
解；33+a=6 (3+a)
33+a=18+6a
15=5a
a=5
答：5年後，母年是女年的6倍。
得：33+a=6 (3+a)
解；33+a=6 (3+a)
33+a=18+6a
15=5a
a=5
答：5年後，母年是女年的6倍。
參考: myself
收錄日期: 2021-04-14 18:54:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080125000051KK02379