Question

За пять журналов и три газеты заплатили 616 рублей, а за два журнала и три газеты заплатили 277 рублей. Сколько стоит одна газета? Помогите пожалуйста очень срочно пж

Answer 1

Ответ:

17 руб

Пошаговое объяснение:

616-277=339руб стоят 3 журнала

339:3=113руб стоит один журнал

113*2=226руб стоят два журнала

277-226=51 руб стоят 3 газеты

51:3=17 руб одна газета

вроде правильно)

Answer 2

616-277=339р (за 3 журнала)
339/3=113р (за 1 журнал)
113*5=565р (за 5 журналов)
616-565=51р (за 3 газеты)
51/3=17р
Ответ: 17 рублей

Answer 3

Problem Analysis

We are given two equations representing the cost of purchasing a combination of magazines and newspapers. We need to find the cost of one newspaper.

Solution

Let's assume the cost of one magazine is m rubles and the cost of one newspaper is n rubles.

From the given information, we can form the following equations:

Equation 1: 5m + 3n = 616 Equation 2: 2m + 3n = 277

To solve these equations, we can use the method of substitution or elimination. Let's use the method of substitution.

From Equation 2, we can express m in terms of n:

2m = 277 - 3n m = (277 - 3n) / 2

Substituting this value of m into Equation 1, we get:

5((277 - 3n) / 2) + 3n = 616

Simplifying the equation:

(277 - 3n) / 2 = (616 - 3n) / 5

Cross-multiplying:

5(277 - 3n) = 2(616 - 3n)

Simplifying further:

1385 - 15n = 1232 - 6n

Bringing like terms together:

9n = 153

Dividing both sides by 9:

n = 17

Therefore, the cost of one newspaper is 17 rubles.

Answer

The cost of one newspaper is 17 rubles.