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OpenStudy (anonymous):
Seventeen members of Troy's family are going to an amusement park during the week of their family reunion. Adult tickets cost $39.50 each and child tickets cost $31 each. If the total cost for admission to the part is $578, how many adults went to the park?
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OpenStudy (y2o2):
let x be number of children and y be number of adults so ; x+y = 17 31x+ 39.50y = 578 x=11 , y=6
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