猜猜看（英语）Jack is twice as old as Bill,who is eight years young

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猜猜看（英语）
Jack is twice as old as Bill,who is eight years younger than Ben, who is four years younger than Ted, who is half as old again as Jack. How old is Bill?
最后一句什麽意思?如何算?

比杰克大半倍
设杰克此时2X岁,
由Jack is twice as old as Bill可知Bill为x岁,
由于who is eight years younger than Ben,所以Ben为x+8 岁
由于who is four years younger than Ted,所以Ted为x+12岁
由最后一句,就有
x+12=1.5x*2
x=6
Bill is 6 years old.

猜猜看（英语）Jack is twice as old as Bill,who is eight years young 英语翻译Jack is twice as old as Bill,who is eight years younger 智力题 JACK IS TWICE AS OID AS BILL,WHO IS EIGHT YEARS YOUNGER jack is twice as old as Bill,who is 8 years younger lhan Ben Jack is twice as oid as bill. Jack is twice as old as Jill, 英语翻译who is half as old again as Jack(从句中的）出自：Jack is twice a jack is twice as old as Bill翻译成汉语甚么意思 Jack is twice as old as Jill ,but in five years time he will Mary is 12 years old.two years ago,she was twice as old as h Mary is 12 years old.Two years ago, shewas twice as old as h that's easy,Bob is twice as old as jack,so he is now thirty.