Question

На птичьем рынке на 19 200 купили двух попугаев , одного щенка и одного котенка . Щенок в 3 раза дороже котенка , но в 2 раза дешевле попугая . Сколько стоит котенок? Сколько стоит попугай?

Answer 1

Пусть х рублей - цена котенка, тогда щенок стоит 3х рублей, а попугай 6х рублей (12х - цена двух попугаев). 12х+3х+х=19200. 16х=19200. х=1200(руб.) - цена котенка. 1200•6=7200(руб.) - цена попугая. Ответ: котенок стоит 1200 рублей, а попугай стоит 7200 рублей.

Answer 2

Calculation of the Cost of the Kitten and the Parrot

To determine the cost of the kitten and the parrot, let's break down the given information:

- Two parrots, one puppy, and one kitten were purchased for a total of 19,200. - The puppy is three times more expensive than the kitten. - The puppy is two times cheaper than the parrot.

Let's assign variables to the unknown costs: - Let P represent the cost of one parrot. - Let K represent the cost of one kitten. - Let D represent the cost of one puppy.

Based on the given information, we can form the following equations:

1. Two parrots, one puppy, and one kitten were purchased for a total of 19,200: - 2P + D + K = 19,200

2. The puppy is three times more expensive than the kitten: - D = 3K

3. The puppy is two times cheaper than the parrot: - D = (1/2)P

To solve this system of equations, we can substitute equation 2 into equation 3 to eliminate D:

3K = (1/2)P

P = 6K

Now, substitute the value of P in equation 1:

2(6K) + D + K = 19,200

Simplify the equation:

12K + D + K = 19,200

13K + D = 19,200

Since we know that D = 3K, we can substitute it into the equation:

13K + 3K