教教我!!!!

2007-04-17 1:51 am
我想問下點計,最緊要步驟;
1-2(x+6)/7 不大於 10-x

回答 (1)

2007-04-17 1:59 am
✔ 最佳答案
<= (小於or等於)
1 - 2(X+6)/7 <= 10-X
1<= 10-x +(2x+12)/7
1<= (70-7x+2x+12)/7
1<= (82-5x)/7
7<= 82-5x
-75 <= - 5x
-75/-5 =>x
x<= 15

希望幫到你=w=

2007-04-16 18:01:11 補充:
如2邊要除負數時 個小於or 等於號 要轉做大於or 等於號

2007-04-16 18:02:10 補充:
不大於 者係要小過10-x 或者係 等於10-x
參考: me


收錄日期: 2021-04-13 00:41:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070416000051KK02767

檢視 Wayback Machine 備份