Question

6.Реши задачу. В России бабушка купила 9 мотков шерсти белого и красного цветов. За красные мотки она заплатила 320 рублей, а за бе- лые - 400 рублей. Сколько белых и красных мотков по отдель- ности купила бабушка, если все мотки стоили одинаково? •~•~•~•~•~кто поможет поставлю 5+.​

Answer 1

Ответ:

1)320+400=720(руб) за 9 мотков

2)720÷9=80(руб) за один моток

3)320÷80=4(м) красный

4)400÷80=5(м) белый

Answer 2

Problem Analysis

In this problem, we are given that a grandmother in Russia bought 9 balls of yarn in white and red colors. The price of the red balls was 320 rubles, while the price of the white balls was 400 rubles. We need to determine how many white and red balls the grandmother bought if all the balls had the same price.

Solution

Let's assume that the grandmother bought x balls of white color and y balls of red color. Since the price of all the balls is the same, we can set up the following equation:

400x + 320y = Total Cost

We know that the grandmother bought a total of 9 balls, so we can also set up the following equation:

x + y = 9

Now we have a system of two equations with two variables. We can solve this system to find the values of x and y.

Solving the System of Equations

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

From the second equation, we can express x in terms of y:

x = 9 - y

Substituting this value of x into the first equation, we get:

400(9 - y) + 320y = Total Cost

Simplifying the equation:

3600 - 400y + 320y = Total Cost

Combining like terms:

-80y + 3600 = Total Cost

Now, we need more information to determine the total cost or the values of x and y. The problem statement does not provide any additional information about the total cost or the price of the balls.

Therefore, without knowing the total cost or the price of the balls, we cannot determine the exact values of x and y. We need more information to solve the problem.

Conclusion

In conclusion, we cannot determine the number of white and red balls the grandmother bought without knowing the total cost or the price of the balls. Additional information is required to solve the problem.