The price of two pairs and six apples is $14. The price of three pairs and nine apples is $21. Can you determine the unit prices for pears and apples? Explain.

no

Step-by-step explanation:

The second purchase is exactly half-again larger than the first purchase, so sheds no light on the relative costs of the items. The per-item costs can be found when the ratio of items purchased is different from one buy to another.

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We can only say that the cost of 1 pear and 3 apples is $7.