Question

Helen is twenty years old ,and her age is four times as much as Mary 's.When Helen 's age is twi...

Helen is twenty years old ,and her age is four times as much as Mary 's.When Helen 's age is twice as much as Mary 's ,how old Helen then ?

Answer 1

翻译：Helen20岁，她的年龄是Mary的4倍。 当Helen的年龄是Mary的两倍的时候，Helen多少岁？
回答：Helen is 30 years old then. 到那时Helen30岁
【楼主参考下~希望对你有帮助~】

Answer 2

Helen 现在20岁，是 Mary岁数的4倍。当 Helen的年纪是 Mary的2倍时， Helen几岁?

Answer 3

Helen = 20岁
Mary = 5 岁
当helen的年龄是mary的双倍，那helen多大了？