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题库 / Prep2007E1-PS-127
The total cost of avacation was divided equally among 3 people. If the total cost of the vacation had been divided equally among 4people, the cost per person would have been $50 less. What was the total cost of the vacation?
$200
$300
$400
$500
$600
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设3个人每人费用为x，则3x=4（x-50），x=200.总cost=3x=600