maths!!!好easy

2007-09-26 6:11 pm

我想問....

y+3/5y = 240

y係咩????

例step!!!!

thanks!!!!!!!!!

回答 (6)

2007-09-26 6:19 pm

✔ 最佳答案

y+3/5y = 240
5(y+3/5y) = 5*240
5y+3y=1200
8y=1200
y=150

👍 0 👎 0

2007-09-26 6:55 pm

通分母是最簡單的,

5/5y+3/5y=240

8/5y=240
8y=240X5
8y=1200
y=150

參考: me

👍 0 👎 0

2007-09-26 6:50 pm

I think is :
y+3/5y = 240

5(y+3/5y) = 5*240

5y+3y=1200

8y=1200

y=150

參考: my maths book

👍 0 👎 0

2007-09-26 6:25 pm

y+3/5y = 240
5(y+3/5y) = 5*240
5y+3y=1200
8y=1200
y=150

👍 0 👎 0

2007-09-26 6:18 pm

y+3/5y = 240
y+5y =240*3
6y =720
y =720/6
y =120

👍 0 👎 0

2007-09-26 6:15 pm

8/5y=240
y=150

參考: self

👍 0 👎 0