A barrel of peanut oil is 80 yuan, which is 20 yuan higher than before. How much higher is the price now? emergency

（80-20）÷80=0.75=75% 1-75%=25%

A bucket of peanut oil weighs 800 grams. After eating half of the oil, you weigh it together. There are 550 grams left. How many grams of the original oil weigh in the bucket? How many grams does the barrel weigh?

According to the meaning of the question: 800-550 = 250 (g); 250 × 2 = 500 (g); 800-500 = 300 (g). Answer: the barrel contains 500g oil, and the empty barrel weighs 300g

A school plans to buy some computers. Now it is learned from two stores that the price of each computer of the same model is 4000 yuan. The manager of the first store said: "the first one is sold according to the price
The original price quoted charges, the rest of each discount 25% ", B mall manager said:" each discount 20% "
(1) If you buy four, which market is more favorable? Buy six?
(2) How many do you buy? The two stores charge the same amount?
(3) Do you know how to choose to save money?

I am also writing this question (1) 1 × 4000 + (4-1) × 4000 × (1-25%) = 13000 yuan (RMB) 4 × 4000 × (1-20%) = 12800 yuan (RMB) 13000 yuan ＞ 12800 yuan (RMB) 1 × 4000 + (6-1) × 4000 × (1-25%) = 16400 yuan (RMB) 6 × 4000 × (1-20%) = 19200 yuan (RMB)

If a color TV is sold by 10% of the price reduction, it will make a profit of 215 yuan. If it is sold by 20% of the price reduction, it will lose 215 yuan. How much is the price of the color TV?

(215 + 215) △ 20% - 10%, = 430 △ 10%, = 4300 yuan; answer: the price of color TV is 4300 yuan

Hongyuan electric appliance store has a color TV set. If it is sold at a price reduction of 10%, it will make a profit of 215 yuan. If it is sold at a price reduction of 20%, it will lose 125 yuan. So how much is the price of this color TV set?

Set the price as X Yuan (1-10%) x-215 = (1-20%) x + 125 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 0.1X = 340 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 3400 A: the price of this color TV is

Hongyuan electric appliance store has a color TV set. If it is sold at a price reduction of 10%, it will make a profit of 215 yuan. If it is sold at a price reduction of 20%, it will lose 125 yuan. So how much is the price of this color TV set?

Set the price as X Yuan (1-10%) x-215 = (1-20%) x + 125 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 0.1X = 340 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 3400 A: the price of this color TV is 3400 yuan

If a computer is sold at a reduced price of 10%, it will make a profit of 215 yuan. If it is sold at a reduced price of 20%, it will lose 125 yuan. How much is the purchase price of this computer?

Let X be the purchase price and y be the price
0.9y-x=215; 0.8y-x=-125
The solution is: x = 2845, y = 3400
The purchase price is 2845 yuan and the price is 3400 yuan

1. A store has two calculators with different purchase prices, both of which sold for 64 yuan. One of them made a profit of 60% and the other made a loss of 20%. In this transaction, did the store make a profit or lose money?
2. The charging standard for short messages of a certain communication operator is as follows: sending intra network short messages of 0.1 yuan / piece and sending inter network short messages of 0.15 yuan / piece. Xiao Wang, the user of the communication operator, sends 150 of the above two kinds of short messages in a month. According to the charging standard, he spends 19 yuan for short messages. How many intra network and international short messages does Xiao Wang send?
To analyze the process, draw a tree or two horizontal three vertical!

1. X (1 + 60%) = 64 = > x = 40 = > earning 64-40 = 24y (1-20%) = 64 = > y = 80 = > losing 80-64 = 1624-16, earning 8 yuan, 2.0.1 * x + 0.15 * y = 19x + y = 150 = > 0.1 (150-y) + 0.15y = 19 = > 15-0.1y + 0.15y = 19 = > 0.05y = 4 = > y = 80x = 150-y = > x = 70, 70 in the network, 80 in the Internet

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

Suppose the price of 60% profit is x yuan, then: x + 60% x = 64 & nbsp; & nbsp; & nbsp; & nbsp; 160% x = 64 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 40, and the price of 20% loss is y yuan, then: y-20% y = 64 & nbsp; 80% y = 64 & nbsp; & nbsp; & nbsp; y = 80, so the total price is: 40 + 80 = 120 (yuan), the total price is: 64 + 64 = 128 (yuan) > the price, 128-120 = 8 (yuan) a: earned 8 yuan

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

A barrel of peanut oil is 80 yuan, which is 20 yuan higher than before. How much higher is the price now? emergency