问题标题:
whenDavidistwiceasoldasheisnowhewillbefourtimesasoldashisdaughterJanewillbeinfiveyearstime.
问题描述:
whenDavidistwiceasoldasheisnowhewillbefourtimesasoldashisdaughterJanewillbeinfiveyearstime.
刘广明回答:
当大卫的年龄增长到现在的两倍时,他的年龄会是那时候他女儿简的年龄的四倍
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