找出y的值
回答 (4)
2007-06-19 4:10 am
6=y-2y/5
6+2y/5=y
2y/5=y-6
2y=5(y-6)
2y=5y-30
30=5y-2y
30=3y
y=30/3
y=10
另一種方法:
6=y-2y/5
5(6)=5(y-2y/5)
30=5y-2y
30=3y
y=10
6+2y/5=y
2y/5=y-6
2y=5(y-6)
2y=5y-30
30=5y-2y
30=3y
y=30/3
y=10
另一種方法:
6=y-2y/5
5(6)=5(y-2y/5)
30=5y-2y
30=3y
y=10
參考: me
2007-06-19 12:46 am
6 = y - 2y / 5
30 = 5y - 2y
30=3y
y = 10
30 = 5y - 2y
30=3y
y = 10
2007-06-19 12:34 am
ans: y=10
首先將6, y 同 2y/5 都乘5先~
目的係想將個分數變成整數!!
即係 30= 5y-2y
30= 3y
所以 y= 10
首先將6, y 同 2y/5 都乘5先~
目的係想將個分數變成整數!!
即係 30= 5y-2y
30= 3y
所以 y= 10
2007-06-19 12:33 am
6 = y - 2y / 5
30 = 5y - 2y
3y = 30
y = 10
2007-06-18 16:33:57 補充：
6 = y - 2y / 530 = 5y - 2y
2007-06-18 16:34:05 補充：
6 = y - 2y / 530 = 5y - 2y
2007-06-18 16:34:16 補充：
6 = y - 2y / 530 = 5y - 2y <=====全部乘53y = 30y = 10
2007-06-21 17:05:36 補充：
輸俾佢？？
冇野好講！
30 = 5y - 2y
3y = 30
y = 10
2007-06-18 16:33:57 補充：
6 = y - 2y / 530 = 5y - 2y
2007-06-18 16:34:05 補充：
6 = y - 2y / 530 = 5y - 2y
2007-06-18 16:34:16 補充：
6 = y - 2y / 530 = 5y - 2y <=====全部乘53y = 30y = 10
2007-06-21 17:05:36 補充：
輸俾佢？？
冇野好講！
收錄日期: 2021-04-13 13:56:32
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https://hk.answers.yahoo.com/question/index?qid=20070618000051KK02545