Question

Задача:Отдам Продвцу сто рублей,покупатель получил столько рублей сдачи,сколько он купил молока,если известно.что она больше 10 и выражается чётным числом рублей.Помагите плиз

Answer 1

Пусть ХY - заплатил за молоко (где Y - стоимость одного литра молока.), тогда Х - сдача.
Зная, что продавцу отдали 100 рублей, составим и решим уравнение:
Х + ХY = 100
ХУ = 100 - Х
У = (100 - Х) : Х
Решим методом пробы ошибок.
У = ( 100 - 4 ) : 4 
У = 24.
Значит, он получил 4 рублей сдачи, купил 4 литра молока, а стоимость одного литра - 24 рублей.

Answer 2

Х + ХY = 100
ХУ = 100 - Х
У = (100 - Х) : Х

 

или:

У = ( 100 - 4 ) : 4 
У = 24.

Answer 3

Task Analysis

The task requires finding the amount of change received by a buyer who paid 100 rubles and bought an even amount of milk, which is more than 10 rubles.

Solution

To solve this problem, we can use a simple mathematical approach. Let's denote the amount of change received as x and the cost of the milk as y. We know that the buyer paid 100 rubles, so we have the equation: 100 - y = x. Additionally, we are given that the cost of the milk is more than 10 rubles and is an even amount, which can be expressed as y > 10 and y is even.

Calculation

To find the possible values of y and x, we can start by considering the possible even values of y greater than 10 and then calculate the corresponding change x.

1. Let's start with y = 12: - If the cost of milk is 12 rubles, the change received would be 100 - 12 = 88 rubles.

2. Next, let's consider y = 14: - If the cost of milk is 14 rubles, the change received would be 100 - 14 = 86 rubles.

3. Continuing, let's consider y = 16: - If the cost of milk is 16 rubles, the change received would be 100 - 16 = 84 rubles.

Conclusion

Based on the given conditions, the buyer could have bought 12, 14, or 16 rubles worth of milk and received 88, 86, or 84 rubles in change, respectively.

I hope this helps! If you have further questions or need additional assistance, feel free to ask.