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最佳答案:设X年后妈妈的年龄是同学的2倍,所以:39+X = 2(12+X)39+X = 24+2X39-24 = 2X-X所以:X=15答:15年后妈妈的年龄是同学年龄
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最佳答案:BBAC
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最佳答案:发现丁丁的妈妈又老的许多,平时丁丁的妈妈都是浓妆艳抹的,显的很年轻,今天是怎么回事呢!大家回头看看丁丁,只见他正用貌似化妆品似的一盒东东在画画,而且还很入神..
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最佳答案:1,Mum often tells me to get on well with my classmates.2,Sorry to have kept you
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最佳答案:i have a classmate called kate,whose mother was my english teacher.Kate is an ea
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最佳答案:1,even though she was tired,she helped her mother with housework.2.nancy gets al
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最佳答案:解题思路:(1)根据所买数量之和为16,总价钱为50列出方程组,把m当成已知数,求得另外两种食品的件数即可;(2)根据每种商品的数量至少为一件得到不等式组,求得
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最佳答案:1、20*20cm的,单块面积=0.2*0.2=0.04平米,阳台面积为:8平米,用200块砖,总价钱为:200*10=2000元2、40cm×40cm的,单块
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最佳答案:I will buy a book for my mother.Tom made a kite for her.One of my classmates.
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最佳答案:心急如焚