Mary is 12 years old .two years ago she was twice her brother john's age .how oldis john now 理由 加翻译 5分钟回复主要是这句的翻译she was twice her brother john's age
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Mary is 12 years old .two years ago she was twice her brother john's age .how oldis john now 理由 加翻译 5分钟回复主要是这句的翻译she was twice her brother john's age
Mary is 12 years old .two years ago she was twice her brother john's age .how old
is john now 理由 加翻译 5分钟回复
主要是这句的翻译she was twice her brother john's age
Mary is 12 years old .two years ago she was twice her brother john's age .how oldis john now 理由 加翻译 5分钟回复主要是这句的翻译she was twice her brother john's age
玛丽今年12岁.两年前,她的年龄是她弟弟约翰的两倍.那么,约翰今年多大了?
John is 7 years old now.
Because two years ago Mary was twice his age. And two years ago, Mary was ten years old, so John was five years old two years ago. So now he is 7 years old.
翻译she was ...
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John is 7 years old now.
Because two years ago Mary was twice his age. And two years ago, Mary was ten years old, so John was five years old two years ago. So now he is 7 years old.
翻译she was twice her brother john's age, 意思是她是她的弟弟约翰的年龄的2倍。
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seven years old .
现在mary12，两年前十十岁，是jhon的2倍，jhon是5岁，两年后所以是7岁
she was twice her brother john's age.她的年龄是她弟弟的2倍
7 years old
Seven
玛丽现在12岁了。 两年前她的年龄是她弟弟John 的两倍。 John现在多大了？
玛丽12岁了，两年前她是她哥哥（弟弟）约翰年龄的二倍。约翰现在多大？
答：因为brother有可能是哥哥也可能是弟弟，但由题意知，玛丽比约翰大，故约翰为弟弟。
所以12-2=10，10除以2等于5，5岁是约翰两年前的年龄，今年再加2，约翰现在为7岁