一道英语智力题不会做,Western states college is 18 years older than sou

一道英语智力题不会做,
Western states college is 18 years older than southern state college.Western is also 2 and the half times as old as southern.How old is southern?
A.12 B.14 C.18
求各位高手老师们把这句话的翻译,答案及原因写出来,好让伦家理解~

ay7067 1年前已收到1个回答举报

pipi3 幼苗

共回答了17个问题采纳率：88.2% 举报

选A.12.
翻译：西部州立大学比南部州立大学早18年.西部州立大学是南部州立大学存在的时间的2.5倍.则南部州立大学存在了多久?
设南部州立大学存在了x年,则根据第二个条件西部州立大学存在了2.5x.根据第一个条件
2.5x-18=x.
解答x=12

1年前

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