The total cost of two pieces of clothing is 500 yuan. In order to make a profit, the store owner decides to price the clothing at 50% of the profit and the clothing at 40% of the profit. In actual sales, at the request of customers, the two pieces of clothing are sold at a 10% discount. In this way, the store makes a total profit of 157 yuan. How much is the cost of the two pieces of clothing?

The total cost of two pieces of clothing is 500 yuan. In order to make a profit, the store owner decides to price the clothing at 50% of the profit and the clothing at 40% of the profit. In actual sales, at the request of customers, the two pieces of clothing are sold at a 10% discount. In this way, the store makes a total profit of 157 yuan. How much is the cost of the two pieces of clothing?

Suppose the cost of a clothing is x yuan, then the cost of B clothing is (500-x) yuan. According to the meaning of the question: 90% · (1 + 50%) x + 90% · (1 + 40%) (500-x) - 500 = 157, the solution is: x = 300500-x = 200

The application problems of linear equation of one variable
If a certain fan is sold at a discount due to seasonal reasons, if it is sold at a 7.50% discount, it will lose 30 yuan; if it is sold at a 10% discount, it will earn 25 yuan. How much is the price/

Let the price be x yuan,
Then 0.75x + 30 = 0.9x-25
0.15x=55
X = 1100 / 3 yuan