Question

1) за 4 кг апельсинов и 3 кг бананов покупатель заплатил 18 рублей . Сколько стоит 1 кг бананов ,если 1 кг апельсинов стоит 3 рубля ?2) Тётя Кёнуль смешала 2 кг чая по 12 рублей и 3 кг чая по 7 рублей. Сколько стоит 1 кг смешаного чая ?

Answer 1

1)3*4=12руб-стоят 4кг апельсинов.
  18-12=6руб-стоят 3кг бананов.
  6:3=2руб-тоит 1 кг бананов.

2)2*12=24руб-за чай по 12руб.
  3*7=21руб-за чай по 7 руб.
2+3=5кг-всего.
24+21=45руб-всего.
45:5=9руб-стоит 1 кг чая.

Answer 2

Calculating the Cost of Oranges and Bananas

To calculate the cost of oranges and bananas, we can use the given information that the buyer paid 18 rubles for 4 kg of oranges and 3 kg of bananas.

Let's denote the cost of 1 kg of oranges as x and the cost of 1 kg of bananas as y.

We can set up the following system of equations based on the given information: 1. 4x + 3y = 18 (the total cost of 4 kg of oranges and 3 kg of bananas is 18 rubles) 2. x = 3 (the cost of 1 kg of oranges is 3 rubles)

To find the cost of 1 kg of bananas, we can solve the system of equations.

First, let's find the value of x using the given cost of 1 kg of oranges: x = 3

Now, we can substitute the value of x into the first equation: 4(3) + 3y = 18 12 + 3y = 18 3y = 18 - 12 3y = 6 y = 2

So, the cost of 1 kg of bananas is 2 rubles.

Calculating the Cost of Mixed Tea

To calculate the cost of 1 kg of mixed tea, we can use the given information that Aunt Kyonul mixed 2 kg of tea priced at 12 rubles per kg and 3 kg of tea priced at 7 rubles per kg.

Let's denote the cost of 1 kg of the mixed tea as z.

We can set up the following equation based on the given information: (2 * 12 + 3 * 7) / (2 + 3) = z (24 + 21) / 5 = z 45 / 5 = z z = 9

So, the cost of 1 kg of the mixed tea is 9 rubles.

Therefore, the cost of 1 kg of bananas is 2 rubles and the cost of 1 kg of mixed tea is 9 rubles.