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The price of a desk is three times that of a chair. The school bought 30 sets of desks and chairs for 2400 yuan. How much are the desks and chairs?
If the price of a chair is x, the price of a table is 3x, and the price of a set of tables and chairs is 4x
30×4X=2400
Then x = 20,
Then the table is 60 yuan and the chair is 20 yuan
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What is the level of primary school students' mathematics?
If 30 sets of tables and chairs are 2400 yuan, then 1 set of tables and chairs is 2400 yuan / 30 = 80 yuan, including the price of 1 table and 1 chair;
The price of a table is three times that of a chair, so the price of a table is equal to three chairs;
That is, the price of 4 chairs = the price of 1 set of tables and chairs = the price of 1 Table + 1 chair = 80 yuan;
So a chair 20 yuan, a table 20 × 3 = 60 yuan
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