Helen is twenty years old ,and her age is four times as much

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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 ?

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

Helen is twenty years old ,and her age is four times as much 进、?1 Jane is four years old.Her brother is three times as ol Mary,who is sixteen yeas old,is four times as old as her bro 10财富1Lily's father is four times as old as her brother.Her b Lily is four years old.Her elder sister kitty is three times Nancy is four years old .And Lucy is five years old.(用as...a lily's father is four times as old as her sister. Lucy is twelve years old.Jack is twenty-four years old.同义句转换 Helen is seven years old. their age is four and three quarter years怎么理解 my grandma is 84.she is four times as old as am .how old am Emily is four years old and so is jane