Mary,who is sixteen yeas old,is four times as old as her brother.How old will Mary be when she is t

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Mary,who is sixteen yeas old,is four times as old as her brother.How old will Mary be when she is t
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Mary,who is sixteen yeas old,is four times as old as her brother.How old will Mary be when she is t
Mary,who is sixteen yeas old,is four times as old as her brother.How old will Mary be when she is t

Mary,who is sixteen yeas old,is four times as old as her brother.How old will Mary be when she is t
十六岁的玛丽,是我弟弟的四倍大,当玛丽……时她多大?
(问题不清啊!)