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華東師大出版社.七年級下册數學. 第六章:一元一次方程 方程的變形,解一元一次方程方法, 第七章:二元一次方程組 二元一次方程組合它的解,二元一次方程的解法,(公式方法,配方法,換元方法,直接方法) 實踐和探索. 這是第一單元.
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