七人住一间,剩余七人;九人住一间,还剩一间;求有几个客人,几间房子?
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![七人住一间,剩余七人;九人住一间,还剩一间;求有几个客人,几间房子?](/uploads/image/z/13564721-65-1.jpg?t=%E4%B8%83%E4%BA%BA%E4%BD%8F%E4%B8%80%E9%97%B4%2C%E5%89%A9%E4%BD%99%E4%B8%83%E4%BA%BA%EF%BC%9B%E4%B9%9D%E4%BA%BA%E4%BD%8F%E4%B8%80%E9%97%B4%2C%E8%BF%98%E5%89%A9%E4%B8%80%E9%97%B4%EF%BC%9B%E6%B1%82%E6%9C%89%E5%87%A0%E4%B8%AA%E5%AE%A2%E4%BA%BA%2C%E5%87%A0%E9%97%B4%E6%88%BF%E5%AD%90%3F)
七人住一间,剩余七人;九人住一间,还剩一间;求有几个客人,几间房子?
七人住一间,剩余七人;九人住一间,还剩一间;求有几个客人,几间房子?
七人住一间,剩余七人;九人住一间,还剩一间;求有几个客人,几间房子?
设:共有x间房子
7x+7=9x-9
2x=16
x=8
7×8+7=63(人)
答:有63个人,8间房子.
有63个人 8间房子
8间,63人
(7+9)÷(9-7)=8间
7×8+7=63人