Question

Слава собирался купить 20 конфет, но ему не хватало для этого 3 руб. Тогда Слава купил 15 конфет, и у него осталось 7 руб. сдачи. Сколько стоит одна конфета? Запиши решение и ответ

Answer 1

(3+7):(20-15)=2
Ответ: 2 рубля

Answer 2

Problem Analysis

Slava wanted to buy 20 candies but was short of 3 rubles. He ended up buying 15 candies and had 7 rubles left as change. We need to find the cost of one candy.

Solution

Let's assume the cost of one candy is 'x' rubles.

According to the given information: - Slava wanted to buy 20 candies, but he was short of 3 rubles. So, the total cost of 20 candies would be 20x rubles minus 3 rubles. - Slava bought 15 candies and had 7 rubles left as change. So, the total cost of 15 candies would be 15x rubles, and the remaining 7 rubles would be the change.

We can set up the following equation to solve for 'x':

20x - 3 = 15x + 7

Simplifying the equation:

20x - 15x = 7 + 3

5x = 10

Dividing both sides by 5:

x = 2

Therefore, the cost of one candy is 2 rubles.

Answer

The cost of one candy is 2 rubles.