Suppose Jack is x years' old,
then Ted is x/2; Ben is x/2-4; Bill is x/2-4-8;
so we can get:x=3(x/2-4-8)
x=72
Bill is 24
jack is twice as old as Bill,who is 8 years younger lhan Ben ,who is 4years younger than Ted,who is
jack is twice as old as Bill,who is 8 years younger lhan Ben ,who is 4years younger than Ted,who is
half as old again as jack.How old is Bill?誰能算出來 請速回.
half as old again as jack.How old is Bill?誰能算出來 請速回.
英語人氣：588 ℃時間：2019-08-18 08:34:12
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