A clothing store bought 100 pieces of a brand of clothing, the purchase price was 350 yuan / piece, and the price was set at 500 yuan / piece. After half of the sales, in order to finish the sales as soon as possible, it was ready to sell at a discount If the profit is not less than 12000 yuan, then the rest of the clothing can be sold at a maximum discount according to the price? (one yuan per time inequality) 2. If someone wants to go to area a 3.3km away, his walking speed is 90m / min, and his running speed is 210m / min. if he has to reach area a in another 30 minutes, how many minutes can he run? One yuan per time inequality) online, etc!

1.12000-（500-350）*50=4500
(4500 / 50 + 350) / 500 = 0.88 (i.e. 8% off)
210x + 90 (30-x) = 3300 x = 5 minutes

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