For a school drama performance, student tickets cost 5 dollars each and adult tickets cost 10 dollars each. The sellers collected 3 dollars comma 570 from 512 tickets sold. Which equation can be used to find c , the number of student tickets sold?

If c is the number of student tickets, then 512 − c is the number of adult tickets. Student tickets bring in 5c dollars, and adult tickets bring in 10(512 − c) dollars. The total collected was $3,570, so the equation is 10(512 − c) + 5c = 3,570, which is choice A.

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