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Who can give me the substitution method of solving math problems in the sixth grade of primary school, the problem of line segments and the problem of hypothesis?
Replace:

(1) There is 360 ml of milk, which is just filled in 3 small cups and 1 large cup. The capacity of a small cup is half that of a large one. What are the capacities of small and large cups?

(2) It cost 252 yuan to buy 4 desks and 9 chairs at school. It is known that the price of chairs is exactly 1/3 (one third) of that of desks. Can you find out how much a chair and a table are through the replacement strategy?

(3) One pig can be exchanged for three sheep, and one cow can be exchanged for six pigs. Q: How many sheep can a cow change?

(4)6 small boxes and 2 large boxes. There are 300 pairs of new sports shoes. There are as many sports shoes in two small cartons as in 1 large carton. How many pairs of sports shoes are there in each big carton? How about each small carton?

(5)5 kg of apples and 4 kg of pears * * * In 46 yuan, the price of 1 kg of apples is 3/2 of that of 1 kg of pears. How much are apples and pears per kilogram?

(6) Three brushes 1 pen ***9.6 yuan. The unit price of a pen is five times that of a brush. Find the unit price of pens and brushes.

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