誰能幫我解一下數學{共5題} - 回收
By William
at 2007-09-17T00:00
at 2007-09-17T00:00
Table of Contents
1.若兩數之和為17,兩數之差為3,則這兩數為何?2.仁愛社區實施資源回收,上個月共整理出x公斤的廢紙和y公斤的鋁灌,如果廢紙每公斤回收價是2元,鋁罐每公斤回收價是5元,請問:1.如果上個月廢紙和呂貫的回收量共10公斤,且回收價總計35元,請列出二元一次聯立方程式.2.解第1題中的聯立方程式,可得到廢紙的回��
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By Elma
at 2007-09-17T16:36
at 2007-09-17T16:36
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at 2007-09-18T04:15
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at 2007-09-17T15:21
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at 2007-09-21T14:41
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at 2007-09-17T21:06
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at 2007-09-19T19:30
at 2007-09-19T19:30
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