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Zhejiang education printing plate eighth grade mathematics summer vacation exercise book third day sixth question
Because x > 4, you can set x=5, so 9-x equals 4, and so on. When x equals 6, 9-x equals 3, when x equals 7, 9-x equals 2, when x equals 8, 9-x equals 1, and because of 4, 3, 2.

So 9-x is less than or equal to 4.