Question

Как решить задачу для приготовления смеси взяли чай 2 сортов : 3 кг первого сорта по 220 руб за 1 кг и 7 кг второго. найди цену второго сорта чая если цена получившейся смеси 171 руб за 1 кг

Answer 1

Тут уравнением
Цена 2 чая - x, всего частей чая 10(3+7).
3*220+7x=171*10
цена 3 частей 1 чая+цена 7 частей 2 чая=цена получившегося чая за 10 частей(кг)
660+7x=1710
x=1710-660
x=1050-это за 7 частей
А за 1 = 1050/7=150

Answer 2

Problem Analysis

To solve this problem, we need to find the price of the second type of tea. We are given that a mixture is made by taking 3 kg of the first type of tea, which costs 220 rubles per kg, and 7 kg of the second type of tea. The resulting mixture has a price of 171 rubles per kg. We need to find the price of the second type of tea.

Solution

Let's assume the price of the second type of tea is x rubles per kg.

To find the price of the second type of tea, we can set up the following equation based on the given information:

(3 kg * 220 rubles/kg + 7 kg * x rubles/kg) / (3 kg + 7 kg) = 171 rubles/kg

Simplifying the equation, we get:

(660 + 7x) / 10 = 171

Multiplying both sides of the equation by 10, we get:

660 + 7x = 1710

Subtracting 660 from both sides of the equation, we get:

7x = 1050

Dividing both sides of the equation by 7, we get:

x = 150

Therefore, the price of the second type of tea is 150 rubles per kg.

Answer

The price of the second type of tea is 150 rubles per kg.