1. The purchase price of apple is 3.8 yuan per kilogram, and it is estimated that 5% of the apples are in normal loss. In order to avoid losing money, how much yuan per kilogram should the seller price at least? 2. It is known that the solution set of inequality (2a-b) x + a-5b > 0 about X is x < 10 / 7. Find the solution set of inequality ax > b about X

The solution set of (2a-b) x + a-5b ＞ 0 is x ＜ 10 / 7. It is deduced that x ＜ (a-5b) / (b-2a) (a-5b) / (b-2a) = 10 / 7, so B = - 3, a = - 5 then x ＜ 3 / 5

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