问题
解答题
已知,甲乙丙三个数的和为26,甲数比乙数大1,甲数的两倍与丙数的和比乙数大18,求这三个数.
答案
设甲数为x,乙数为y,丙数为z,根据题意得:
,x+y+z=26 x-y=1 2x+z-y=18
解得:
,x=10 y=9 z=7
则甲数是10,乙数是9,丙数是7.
已知,甲乙丙三个数的和为26,甲数比乙数大1,甲数的两倍与丙数的和比乙数大18,求这三个数.
设甲数为x,乙数为y,丙数为z,根据题意得:
,x+y+z=26 x-y=1 2x+z-y=18
解得:
,x=10 y=9 z=7
则甲数是10,乙数是9,丙数是7.
根据短文内容,从下面方框中选择适当的选项补全短文。 My mother is a kind and nice woman. 小题1: One Sunday night, when I was watching the film Harry Potter very happily, Mother asked me to go to bed. 小题2: that I didn’t move. But for a while, I noticed that she didn’t say anything. 小题3: I was so sad and that I went into my room and cried. I thought “I have only two nights in a week to enjoy the TV. 小题4: ” The next day she cooked and talked with me as usual. I pretended not to hear, but she didn’t mind and told me why she didn’t allow me to watch TV, because she wanted me to have a good rest. Then I understood her. I love my mother.
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