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It's forbidden to use arithmetic. It's required to write out the solution and the answer 1. Students went to Beihai Park to row a boat. It cost 565 yuan to rent 32 big boats and 32 small boats. It is known that the rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. How many big boats and small boats did you rent? 2. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan, which costs 360 yuan. It is known that the number of big boats rented by students is 1.5 times of that of small boats. How many big boats and small boats did you rent? 3. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. It costs 680 yuan in total. It is known that the number of big boats rented by students is 1.5 times that of small boats. How many big boats and small boats did you rent? 4. Students go boating in Beihai Park. The rental price of each big boat is 20 yuan, and that of each small boat is 15 yuan. The number of big boats rented by students is 1.5 times that of small boats. It is known that the cost of renting big boats is 180 yuan more than that of renting small boats. How many big boats and small boats have you rented?
Let the students rent x large boats, then they rent (32-x) small boats. 20x + 15 (32-x) = 56520x + 480-15x = 56520x-15x = 565-4805x = 85x = 17 (32-x) = 32-17 = 15 A: the students rent 17 large boats, 15 small boats. If the number of small boats is x, then they rent 1.5x large boats. 15x + 20 × 1.5x = 36015
With all the money, you can buy 6 pencils and 11 notebooks, as well as 8 pencils and 7 notebooks. If you have all the money, how many notebooks can you buy?
6 pencils + 11 books = 8 pencils + 7 books
11-7=8-6
4=2
4 notebooks = 2 pencils
1 pencil = 2 notebooks
There are 23 books in all
There are three piles of stones, i.e. pile a, pile B and pile C. eight of them are taken from pile a to pile B, and the quantity of pile a and pile B is equal. At this time, six of them are taken from pile B to pile C, and the quantity of pile B and pile C is equal. At this time, two of them are taken from pile C to pile a. the quantity of pile a is twice that of pile C. how many stones are there in pile a, pile B and pile C?
If a gives 8 to B and a and B are equal, it means that a gives 8 + 8 = 16 more than B and B gives 6 to C. if B and C are equal, it means that after a gives 8 to B, B gives 6 + 6 = 12 more than C. then it turns out that B gives 12-8 = 4 more than C and a gives 4 + 16 = 20 more than C. A gives 8 to B and B gives 6 to C. After C gives 2 more to a, a gives 20-8-6 + 2 * 2 = 10 more than C
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