2. 外语
  3. Point a and b are on the number line, the distance between a and b is 7, if a = 7, what is the possible value of b?

Point a and b are on the number line, the distance between a and b is 7, if a = 7, what is the possible value of b?

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问题 Point a and b are on the number line, the distance between a and b is 7, if a = 7, what is the possible value of b?
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答案0或14
解析 a与b之间的距离为|a-b|=|7-b|=7，因此7-b=7或7-b=7，b=0或14。
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