一條數學方程題!!!!!!`~~~~(10點啊~~~)

2009-10-11 6:17 pm
唔該各位數學叻既人幫幫忙啦~
幫我計計下面呢條數...
我係要計呢數既程序`唔系答案!!
呢條數既答案系3分1`
唔該幫幫忙!!!
聽日交啦...
我要快啊~~

2x=3(1-x)-(x+1)

回答 (4)

2009-10-11 6:20 pm
✔ 最佳答案
2x=3(1-x)-(x+1)
2x = (3 - 3x) - (x + 1)
2x = 3 - 3x - x - 1
6x = 2
x = 1/3
2009-10-12 12:45 am
2x=3-3x-x-1
2x=-4x+2
2x+4x=2
6x=2

x=1/3

‧其實這一條方程不太難, 問題在於你自己的數字感和你對正負數的認識。(好好溫習吧...)
2009-10-11 6:55 pm
2x=3(1-x)-(x+1)
2x=3-x-x+1
2x=4-2x
4x=4
x=1

2009-10-11 10:57:47 補充:
I am sorry for i am wrong.
2x=3(1-x)-(x+1)
2x=3-3x-x-1
2x=2-4x
6x=2
x=2/6

2009-10-11 10:58:29 補充:
2x=3(1-x)-(x+1)
2x=3-3x-x-1
2x=2-4x
6x=2
x=2/6
參考: I, I, I
2009-10-11 6:22 pm
2X=3-3X-X+X
2X=3-3X
3X+2X=3
5X=3
X=3/5 or 0.6

/ = 除號

2009-10-11 10:24:48 補充:
- -sorry計錯了
樓上個個先岩


收錄日期: 2021-04-13 16:53:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091011000051KK00471

檢視 Wayback Machine 備份