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Mathematics 20 Online
OpenStudy (anonymous):

On Tuesday, 525 people bought tickets to the county fair. Tickets cost $7 for adults and $3 for children. The total revenue from ticket sales on Tuesday was $2775. The system of equations below represents the number of people and total sales for the county fair on Tuesday, where x represents the number of child tickets and y represents the number of adult tickets. How many adult tickets were sold on Tuesday? A. 280 B. 340 C. 300 D. 225

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