Question 1140072
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Let x = # of adults tickets.


Then the number of student tickets is 2x.


x + 2x = 285


3x     = 285


x = 285/3 = 95.


<U>ANSWER</U>.  95 adult tickets.


<U>CHECK</U>.   95 + 2*95 = 285  tickets.   ! Correct !
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Solved.