有 4 个数,每次取其中三个数相加,和分别是 22.24.27.和 20.这四个数分别是多少?

作者: tihaiku 人气: - 评论: 0
问题 有 4 个数,每次取其中三个数相加,和分别是 22.24.27.和 20.这四个数分别是多少?
选项
答案 9、7、4、11
解析 设四个数之和为x,得22+24+27+20=3x,x=31,四个数为31-22=9,31-24=7,31-27=4,31-20=11.答:这四个数各是9,7,4,11.

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