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小学数学寒假作业题

2024-12-05 03:00:12
推荐回答（4个）
回答1：

解：设二等奖x人，则三等奖有6x人，则一等奖有100-x-6x=100-7x人，所以
1000（100-7x)+250x+50×6x=9700
100000-7000x+550x=9700
100000-6450x=9700
6450x=100000-9700=90300
x=14
所以二等奖14人

回答2：

设二等奖x人，则三等奖6x人，一等奖100-7x人

由题意得：1000*（100-7x）+250x+50*6x=9700

解之，得：x=14

二等奖14人

回答3：

设二等奖x人，则三等奖6x人，一等奖100-7x人

则有：1000*（100-7x）+250x+50*6x=9700

解得：x=14

回答4：

14个，谢谢

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