2019中考数学一轮复习第一部分教材同步复习第二章方程(组)与不等式(组)第7讲分式方程权威预测.doc

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1第一部分 第二章 第 7讲1分式方程 的解为_ x2_.2x 1 4x2某商店用 1 050元购进第一批某种文具盒,很快卖完又用 1 440元购进第二批该种文具盒,但第二批每个文具盒的进价是第一批进价的 1.2倍,数量比第一批多了 10个求第一批每个文具盒的进价是多少元解:设第一批每个文具盒的进价是 x元,则第二批每个文具盒的进价是 1.2x元根据题意,得 10,解得 x15,1 4401.2x 1 050x检验:当 x15 时,1.2 x0,所以 x15 是原分式方程的解答:第一批每个文具盒的进价是 15元

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