Question

В 5 "А" 30 детей. мальчиков в 2 раза больше чем девочек. ск. девочек??

Answer 1

Ответ:

Девочек - 10

Пошаговое объяснение:

девочек - х

мальчиков - 2*х

Всего - 30 детей

х+2*х=30

3х=30

х=30:3

х=10 - девочек в классе

10*2=20 - мальчиков в классе

Answer 2

Let's solve this step-by-step:

1. We know there are 30 children in total in class 5 "А".
2. Let's assume the number of girls in the class is represented by "x."
3. It is given that the number of boys is twice the number of girls. So, the number of boys would be 2x.

Now, we can set up an equation based on the total number of children:

Total children = Number of boys + Number of girls

30 = 2x + x

Now, combine the terms on the right side:

30 = 3x

To find the value of x (the number of girls), divide both sides by 3:

x = 30 / 3

x = 10

So, there are 10 girls in class 5 "А". Since the number of boys is twice the number of girls, there would be:

Number of boys = 2 * 10 = 20 boys.