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The retail price of each item in a certain store consists of the cost of the item, a profit that is 10 percent of the cost, and an overhead that is 30 percent of the cost. If an item in the store has a retail price of $21, what is the cost of the item?
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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。
