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7.You are buying t-shirts for the members of the math club. Each short-sleeve t-shirt costs$10 and each long-sleeve t-shirt costs $17. If you purchase x short-sleeve t-shirts and ylong-sleeve t-shirts, write an equation to represent the total cost of the purchase.

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You have the following infromation:

- Each short-sleeve t-shirt costs $10

- Each long-sleeve t-shirt costs $17

If x represent the number of short-sleeve t-shirt you buy and y the number of long-sleeve t-shirt you buy, then, the total cost of the purchase can be written in the following algebraic way:

total cost of the purchase = 10x + 17y

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