Question

В парке за три дня посадили 210 деревьев.сколько деревьев было высажено в каждый из этих дней ,если в первый день деревьев посалили в 2 раза меньше,чем 2,а в з день на 10 деревьев больше чем в первый?нарисуй схему .А можно решить без уравнений?

Answer 1

Могу предложтть решение только с уравнением! пусть х деревьев посадили в 1-й день, тогда во 2-й день посадили 2х, а в 3-й день посадили х+10. запмсываем и решаем уравнение

x+2x+(х+10)=210
3х+х+10=210
4х+10=210
4х=210-10
4х=200
х=200/4
х=50

таким образом в 1-й день посадили 50 деревьев, во второй день 100, в третий 60.

Answer 2

Problem Analysis

We are given that 210 trees were planted in a park over the course of three days. We need to determine how many trees were planted each day, given that on the first day, the number of trees planted was two times less than the second day, and the third day had 10 more trees than the first day.

Solution

Let's assume the number of trees planted on the first day is x. According to the given information: - The number of trees planted on the second day is twice the number planted on the first day: 2x. - The number of trees planted on the third day is 10 more than the number planted on the first day: x + 10.

To find the values of x and 2x, we can set up an equation: x + 2x + (x + 10) = 210.

Simplifying the equation: 4x + 10 = 210.

Subtracting 10 from both sides: 4x = 200.

Dividing both sides by 4: x = 50.

Therefore, the number of trees planted on the first day is 50, and the number of trees planted on the second day is twice that, which is 100. The number of trees planted on the third day is 10 more than the first day, which is 60.

Diagram

Here is a diagram representing the number of trees planted each day:

Day 1: 50 trees
Day 2: 100 trees
Day 3: 60 trees

Conclusion

In summary, 50 trees were planted on the first day, 100 trees were planted on the second day, and 60 trees were planted on the third day.