200-2x+20%=x-40%

2008-11-14 12:28 am

200-2x+20%=x-40%
=?
本人Maths勁差，所以唔識

更新1:

x=?

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~

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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

參考: me

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2008-11-14 4:31 am

200-2x+20%=x-40%
200-2x+0.2=x-0.4
x=1003/15

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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

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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%

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