Three people each contributed x dollars toward the purchase of a car. They then bought the car for y dollars, an amount less than the total number of dollars contributed. If the excess amount is to be refunded to the three people in equal amounts, each person should receive a refund of how many dollars?
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A$$\frac{3x-y}{3}$$
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B$$\frac{x-y}{3}$$
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C$$\frac{x-3y}{3}$$
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D$$\frac{y-3x}{3}$$
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E$$3(x-y)$$