=?
本人Maths勁差，所以唔識
更新1:
x=?
200-2x+20%=x-40%
回答 (5)
2008-11-14 1:21 am
✔ 最佳答案
200-2x+20%=x-40%200-2x+0.2=x-0.4
199.8-2x=x
199.8=3x
x=66.6
參考: 會考數學拿c既人~
2008-11-14 9:45 pm
200-2x+20%=x-40%
200-2x=x-60%
200=3x-60%
200+60%=3x
200+0.6=3x
200.6=3x
.
x=66.86
200-2x=x-60%
200=3x-60%
200+60%=3x
200+0.6=3x
200.6=3x
.
x=66.86
參考: me
2008-11-14 4:31 am
200-2x+20%=x-40%
200-2x+0.2=x-0.4
x=1003/15
200-2x+0.2=x-0.4
x=1003/15
2008-11-14 12:53 am
200-2x+20%=x-40%
200-2x+20%+40%= x-40%+40%
200-2x+60%=x
200-2x+2x+60%=x+2x
200+60%=3x
x= (200+60%)/3
200-2x+20%+40%= x-40%+40%
200-2x+60%=x
200-2x+2x+60%=x+2x
200+60%=3x
x= (200+60%)/3
2008-11-14 12:32 am
問我就對啦
200-2x+20%=x-40%
200-2x+20%+40%=x-40%+40%
x=200-2x+60%
200-2x+20%=x-40%
200-2x+20%+40%=x-40%+40%
x=200-2x+60%
收錄日期: 2021-04-16 22:24:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081113000051KK00426