A computer can make a profit of 215 yuan if it is sold at a price reduction of 10%; if it is sold at a price reduction of 20%, it will lose 215 yuan

Original price = (215 + 215) / (20% - 10%) = 4300 yuan
Purchase price = 4300 × (1-10%) - 215 = 3655 yuan
Do not understand can ask, help please adopt, thank you!

RELATED INFORMATIONS

1. A store has two calculators with different purchase prices, both of which sold for 80 yuan. One of them made a profit of 60% and the other lost 20%. In this transaction, the store How many yuan did you earn
2. A store has two calculators with different purchase prices. They all sold for 64 yuan. One of them made a profit of 60% and the other lost 20%. In this transaction, the store () A. No loss, no gain B. earn 8 yuan C. lose 8 yuan D. earn 32 yuan
3. A shop has two calculators with different prices. They both sold for 80 yuan. One of them made a profit of 60% and the other lost 20%. In this transaction, the shop lost 20% How much do you earn? Solve it with a linear equation of one variable (and why
4. A store has two calculators with different prices, both of which sold for 80 yuan. One of them made a profit of 60% and the other lost 20%. In this transaction, the store () A. Don't lose don't earn B. earn 10 yuan C. lose 10 yuan D. earn 8 yuan
5. A store has two calculators with different prices, both of which sold for 80 yuan. One of them made a profit of 60% and the other lost 20%. In this transaction, the store () A. Don't lose don't earn B. earn 10 yuan C. lose 10 yuan D. earn 50 yuan
6. It is understood that as long as the clothing sales of individual clothing stores are 20% higher than the purchase price, they can make profits, but the owners often pay more than the purchase price 50% ～ 100% price. If you are going to buy a garment with a price of 120 yuan, within what range should you make a counter-offer?
7. It is understood that individual clothing sales as long as 20% higher than the purchase price can be profitable, but the boss often 50% - 100% higher than the purchase price of the standard pricing, if you are ready to buy Individual clothing sales as long as 20% higher than the purchase price can be profitable, but the boss often to 50% - 100% higher than the purchase price of the standard pricing, if you are ready to buy the price of 200 yuan clothing, should be in what range counter-offer? 、 Baby 19:36:33 2. It takes 12 months for team a to complete a project and 15 months for team B to complete it alone. Now it is decided that the two teams will cooperate. In order to speed up the work, both teams will improve their work efficiency. If the work efficiency of team a is increased by 40% and that of team B is increased by 25%, how many months can the two teams cooperate to complete the project?
8. It is understood that individual clothing sales as long as 20% higher than the purchase price will be profitable, but the owners often bid 50% - 100% higher than the purchase price If you are going to buy a dress with a price of 300 yuan, what range should you counter - offer
9. According to the survey, the clothing sold by individual clothing stores can be profitable as long as the price is higher than 20% of the purchase price, but the owners often price the clothing 50% - 100% higher than the purchase price. If you are going to buy a clothing with a price of 300 yuan, you should______ ～______ Within the range of RMB?
10. The purchase price of a certain commodity is 180 yuan. When it is sold at a 10% discount on the marked price, the profit margin is 20%______ Yuan
11. A shopping mall sells smart phones of brand a and brand B. the purchase price and selling price of these two kinds of mobile phones are shown in the table below: ·························A ·········· B Purchase price (RMB / unit) 4000 ·········· 2500 Price (yuan / unit) 4300 The mall plans to buy 50 mobile phones of two kinds, which will cost a total of 155000 yuan. How much gross profit can be obtained after all sales? (gross profit = (selling price purchase price) × sales volume)
12. 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!
13. In order to improve teaching efficiency, the school wants to buy some TV sets to be installed in the classroom. The purchase price of TV sets is 1000 yuan, and the selling price is 1400 yuan. Because the school buys more TV sets, the store is ready to sell them at a discount. If the profit margin is 12%, how much discount does the store give?
14. Schindler electronics stores sell certain electronic products at a price of 12 yuan per piece and 20 yuan per piece, Every time you buy one more, the price will be reduced by 0.10 yuan, but the lowest price is 16 yuan / piece 1. Ask customers how many at least they can buy at the lowest price at a time? 2. Write the functional relationship between profit y (yuan) and purchase quantity x (pieces) when x pieces are purchased at one time (x > 10) 3. According to this kind of promotion method, please analyze: does the store sell more and earn more? If so, please explain the reason; if not, in order to make more money each time, try to explain through calculation: under the condition of other promotion conditions unchanged, how much should the lowest price be raised to 16 yuan / piece at least?
15. If a bookstore sells a new book at a 10% discount on its price, it can still make a profit of 20% A. 26 yuan B. 27 yuan C. 28 yuan D. 29 yuan
16. A store sells an electronic organ at a discount. The purchase price of an electronic organ is 1800 yuan. If it is sold at 20% off the price, the profit will not be less than 10% of the actual price, So what is the price range of electronic organ?
17. The store gives a 20% discount on a certain commodity. It is known that its original price is 2200 yuan, and the profit margin after discount is 10%, indicating the purchase price of the commodity Equation solution)
18. A store sells an electronic organ at a discount. The purchase price of an electronic organ is 2400. If it is sold at 20% off the marked price, the profit will not be less than 10% of the actual price, What is the price range of the electronic organ It's mathematics, one yuan, one time!
19. The profit problem in discount sale The cost price of a store's clothing is a yuan. If the price is increased by 40% of the cost price, the price will be 〔 yuan. If the price is sold at a 20% discount, the actual price will be 〕 yuan, and the store will make a profit of 〕 yuan
20. The purchase price of a commodity is 150 yuan, and the price is 200 yuan. The mall decides to sell it at a discount. In order to ensure that the profit is not less than 20%, how much discount at most