Question
A plane had some passengers at the beginning. After 15 passengers alighted from the plane and another 45 passengers boarded the plane, there were 6 times as many passengers as before. How many passengers were there on the plane at first?
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A plane had some passengers at the beginning. After 15 passengers alighted from the plane and another 45 passengers boarded the plane, there were 6 times as many passengers as before. How many passengers were there on the plane at first?