Question

Три школы посадили в парке 52 дерева. Вторая школа посадила в 2 раза больше деревьев, чем первая, а третья- на 7 деревьев больше, чем вторая. Сколько деревьев посадила каждая школа?

Answer 1

X+х+2x+2x+7=52
5x+7=52
5x=45
x=9
9*2=18(во втором)
2*9+7=25

Answer 2

Problem Analysis

We are given information about three schools that planted a total of 52 trees in a park. The second school planted twice as many trees as the first school, and the third school planted 7 more trees than the second school. We need to determine how many trees each school planted.

Solution

Let's assume the number of trees planted by the first school is x.

According to the given information: - The second school planted twice as many trees as the first school, so the number of trees planted by the second school is 2x. - The third school planted 7 more trees than the second school, so the number of trees planted by the third school is 2x + 7.

The total number of trees planted by all three schools is 52, so we can write the equation:

x + 2x + (2x + 7) = 52

Simplifying the equation:

5x + 7 = 52

Subtracting 7 from both sides:

5x = 45

Dividing both sides by 5:

x = 9

Therefore, the first school planted 9 trees, the second school planted 2 * 9 = 18 trees, and the third school planted 2 * 9 + 7 = 25 trees.

Answer

The first school planted 9 trees, the second school planted 18 trees, and the third school planted 25 trees.