Question

У Марины бвло 4краснвх и 2зеленых шарика.Когда ей несколько шариков подарили их стало 9.Сколько шариков подарили?

Answer 1

4+2=6  шариков было у Марины
9-6=3   шариков Марине подарили
Ответ: 3 шарика подарили

Answer 2

1. 4+2=6 шариков было у Марины
2. 9-6=3 шарика Марине подарили

Answer 3

Solution

To solve this problem, we can use a system of equations to represent the given information and then solve for the number of balls that were given to Marina.

Let's denote the number of red balls as r and the number of green balls as g. We are given that Marina initially had 4 red balls and 2 green balls, and after receiving some more balls, the total number became 9.

We can represent this information with the following equations:

1. r + g = 6 (Marina initially had 4 red balls and 2 green balls) 2. r' + g' = 9 (After receiving some more balls, the total number became 9, where r' and g' are the new numbers of red and green balls)

We can solve this system of equations to find the values of r' and g', which will give us the number of balls that were given to Marina.

Solution Steps

1. We can start by subtracting equation 1 from equation 2 to eliminate the variables: - (r' - r) + (g' - g) = 9 - 6 - r' - r + g' - g = 3

2. From equation 1, we know that r = 6 - g, so we can substitute this into the previous equation: - r' - (6 - g) + g' - g = 3 - r' - 6 + g + g' - g = 3 - r' + g' - 6 = 3 - r' + g' = 9

3. We can see that r' + g' = 9, which is the same as equation 2. This means that the number of balls given to Marina is the difference between the total number of balls after receiving some more and the initial total number of balls.

Conclusion

The number of balls given to Marina can be found by subtracting the initial total number of balls from the total number of balls after receiving some more. Therefore, the number of balls given to Marina is 9 - 6 = 3.

So, 3 balls were given to Marina.