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GRE 數學問題

1. The daily rate for a hotel room that sleeps 4 people is 39$ for one person and X dollars for each additional person. If 3 people take the room for one day and each pays 21 for the room

what is the value of X?ans; 122.In 1985 Country D had approximately how many motor vehicles per square mile?(1985 D Country 是49 Per square Kilometer)Ans;1253. X

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    the square milesquare mile square Kilometer hotel room motor vehicles the room for one day GRE daily rate Country GRE 數 1985
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