The total cost price of the two commodities is 200 yuan. The price of commodity a is 30% of the profit, that of commodity B is 20% of the profit, and that of the last two commodities is 90%

The total cost price of the two commodities is 200 yuan. The price of commodity a is 30% of the profit, that of commodity B is 20% of the profit, and that of the last two commodities is 90%

Check no person sxy
If the cost of commodity a is x, then the cost of commodity B is 200-x,
The equation of one variable is obtained as follows: [1.3x + 1.2 × (2000-x)] × 0.9-200 = 277
The solution equation is as follows: 1. Add 2000 on both sides and divide by 0.9 to get 1.3x + 1.2 (200-x) = 2530
2. Remove the brackets and merge the similar items to get 0.1X = 130
So we get x = 1300, then we get 200-x = 70
Therefore, the cost of commodity a is 130 yuan and that of commodity B is 70 yuan