On the tree planting day, the students of Grade 7 and grade 4 in a school volunteer to plant trees. Class 1 plants x trees. The number of trees planted in class 2 is 40 less than twice of class 1. The number of trees planted in class 3 is 30 more than half of class 2. The number of trees planted in class 4 is 30 more than half of class 3

On the tree planting day, the students of Grade 7 and grade 4 in a school volunteer to plant trees. Class 1 plants x trees. The number of trees planted in class 2 is 40 less than twice of class 1. The number of trees planted in class 3 is 30 more than half of class 2. The number of trees planted in class 4 is 30 more than half of class 3

Tree planting in class 1: X trees, tree planting in class 2: 2x-40 trees, tree planting in class 3: (2x-40) / 2 + 30 = x-20 + 30 = x + 10 trees, tree planting in class 4: (x + 10) / 2 + 30 = x / 2 + 35 trees, tree planting in four classes: x + (2x-40) + (x + 10) + X / 2 + 35 = 4.5X + 5 trees, tree planting in class 1: 60 trees, tree planting in class 2: 2x -

Students of four classes in grade seven of a school plant trees voluntarily on tree planting day
The number of trees planted in the first class is x, the number of trees planted in the second class is 40 times less than that in the first class, the number of trees planted in the third class is half of that in the second class, and the number of trees planted in the fourth class is 30 more than that in the third class
How many trees are planted in four classes
When x = 60, which of the four classes planted the most trees?

First find out the value of X and then substitute it

On tree planting day, the number of trees planted in class 1 of Grade 7 is 20% more than that in class 2, and the number of trees planted in class 2 is 10 more than that in class 1
The above is the title, and the following is the question:
1. According to the meaning of the question, list the equation with X as the unknown number
2. Check whether the number of trees planted in class (2) and class (1) is 25 and 35 respectively.

If x trees are planted in 2 classes, 1.2x trees are planted in 1 class
(1.2x)/2+10=x
x=25
1.2x=30

The tree planting day is coming. The school organizes tree planting. There are 120 more trees planted in grade 4 than in Grade 5. The number of trees planted in grade 4 is three times that in Grade 5. How many trees are planted in each of the two grades

Let the fourth grade be x and the fifth grade be y
x-y=120
x=3y
x=180
y=60