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OpenStudy (anonymous):
On a trip, the fare was 75¢ for each adult and 50¢ for each child. If 20 passengers paid $12.00, how many adults and children went? Which of the following equations could not be used to solve the problem? (A) 75x + 50(20 - x) = 1200 (B) 75(20 - x) + 50x = 1200 (C) 75x + 50x = 20(1200)
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