Mary is 12 years old.Two years ago,she was twice as old as h

Mary is 12 years old.Two years ago,she was twice as old as her brother Jack.How old is Jack now?
我读不太懂这是什么意思,希望英语能手能帮帮我回答这个问题
asurayu 1年前 已收到1个回答 举报

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句子意思:玛丽12岁,2年前,他的年龄是他的兄弟杰克的2倍大,杰克现在多大了?玛丽今年12岁,两年前10岁,10是5的二倍,杰克两年前5岁,今年杰克7岁 How old will Mary be when Jack is twice his present age?present age意思:现在的年龄句子意思:当杰克是他现在年龄的二倍的时候玛丽多少岁?玛丽现在12岁,杰克现在7岁,相差5岁.杰克年龄是现在二倍时(7X2=14)杰克14岁,则玛丽岁数为14+5=19岁

1年前

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