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A customer purchased n items at Store F. If 5 of the n items cost $7 each and the remaining items cost $9 each, then in terms of n, what was the total cost, in dollars, of the items purchased by the customer at Store F?
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· 相关考点
3.3.1 解一元一次方程与相关应用题
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。
