Question

Незнайка хотел купить 5 порций мороженого, но жму не хватило 65 рублей. Тогда он купил 2 порции мороженого и у него осталось 85 рублей. Сколько было изначально? СРОЧНО ПОМОГИТЕ В ТЕЧЕНИИ 10 МИНУТ

Answer 1

Ответ:

5х-70=2х+80

5х-2х=80+70

3х=150

х=50 цена 1порция мороженного

50х2+80=180руб было

Answer 2

Ответ: 150

Пошаговое объяснение:

65+85=150

Answer 3

Problem Analysis

The problem states that Niznayka wanted to buy 5 portions of ice cream but was short of 65 rubles. He then bought 2 portions of ice cream and had 85 rubles left. We need to determine how much money Niznayka initially had.

Solution

Let's assume that Niznayka initially had X rubles. According to the problem, he was short of 65 rubles to buy 5 portions of ice cream. This means that the cost of 5 portions of ice cream is 65 rubles more than what Niznayka had initially.

After buying 2 portions of ice cream, Niznayka had 85 rubles left. This means that the cost of 2 portions of ice cream is equal to the difference between what Niznayka initially had and what he had left.

We can set up the following equations based on the given information:

Equation 1: X + 65 = 5 * C Equation 2: X - 85 = 2 * C

Here, C represents the cost of one portion of ice cream.

To solve these equations, we can subtract Equation 2 from Equation 1:

(X + 65) - (X - 85) = 5 * C - 2 * C

Simplifying the equation:

150 = 3 * C

Dividing both sides by 3:

C = 50

Now that we know the cost of one portion of ice cream is 50 rubles, we can substitute this value back into Equation 2 to find the initial amount of money Niznayka had:

X - 85 = 2 * 50 X - 85 = 100 X = 100 + 85 X = 185

Therefore, Niznayka initially had 185 rubles.

Answer: Niznayka initially had 185 rubles.