jack 的年龄是 bill 的两倍,bill 比 ben 小八岁,ben 比 ted 小四岁,ted 年龄是 jack 的一倍.问 bill 多大?
答案:4岁.
bill=1/2 jack
ben=bill+8=1/2 jack +8
ted=ben+4=1/2 jack +8+4=2 jack,3/2 jack=12,jack=8,bill=8/2=4
什么意思啊 帮我翻译一下Jack is twice as old as BillWho is eight years y
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