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A group of adults and children spent a total of $420 for tickets and food at the circus. Tickets to the circus cost $20 per adult and $10 per child. If the group spent an average of $21 per person for tickets and food, and there were the same number of adults as children in the group,what was the total amount that the group spent on food at the circus?
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· 相关考点
5.2.1 平均值 3.3.1 解一元一次方程与相关应用题
5.2.1 平均值
3.3.1 解一元一次方程与相关应用题
以上解析由 考满分老师提供。
