國中數學一元一次方程式 - 酒精
By Andrew
at 2011-08-19T00:00
at 2011-08-19T00:00
Table of Contents
酒.水混合液若干公升,其中酒佔70%,加入20公升的水後,則酒佔60%,問酒精原有幾公升?
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酒精
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By Adele
at 2011-08-21T17:19
at 2011-08-21T17:19
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