Column equation to solve the problem, to the number of relations! Fifth grade students rent some boats. If each boat takes 4 people, there will be 5 more; if each boat takes 5 people, there will be 4 vacancies. How many students and how many boats are there?

Column equation to solve the problem, to the number of relations! Fifth grade students rent some boats. If each boat takes 4 people, there will be 5 more; if each boat takes 5 people, there will be 4 vacancies. How many students and how many boats are there?

We chartered x ships
According to the same number of people:
4x+5=5x-4
∴x=9
4 × 9 + 5 = 41
There are 41 students and 9 boats

Three math problems
The net content of a bottle of juice is three-quarters of a liter. Xiaohua drinks two-thirds of such a bottle of juice. How many liters of juice does Xiaohua drink?
Xiao Hua has read three eighths of a 152 page story book. How many pages have he read?
The oxygen content in the air accounts for about one fifth. How many kilograms of oxygen are there in 4000 grams of air?
If you can't write the quantity relation, you don't have to write it

1、(3/4)×(2/3)=1/2
So I drank 1 / 2 liter
2、 152×(3/8)=57
I've read page 57
4、 4×(1/5)=4/5
So it's 4 / 5kg oxygen

Write sentences with appropriate connectives as required
According to the requirements, use the appropriate connective words to connect "afforestation every year" and "can make Huanggang a green garden city" into two different sentences

If we plant trees every year, we can turn Huanggang into a green garden city
Only by planting trees every year can Huanggang become a green garden city

The store brought in a batch of TV sets and sold 18 sets. The ratio of the remaining TV sets to the number sold was 4:3. How many TV sets were brought in?

A: a total of 42 TV plays have been brought in

The store brought in a batch of TV sets and sold 18 sets. The ratio of the remaining TV sets to the number sold was 4:3. How many TV sets were brought in?

A: a total of 42 TV plays have been brought in

The store brought in a batch of TV sets and sold 18 sets. The ratio of the remaining TV sets to the number of TV sets sold was 3:2. How many TV sets did the store bring in?

18 △ 3x (3 + 2) = 30 TV sets

The store brought in a batch of TV sets and sold 18 sets. The ratio of the number of TV sets sold to the number of TV sets transported was 3:7. How many TV sets were transported in total?

The total number of TV sets is X. 3:7 = 18: X 3x = 7 × 183x = 126x = 42

The store brought in a batch of laptops and sold 18. The ratio of the rest to the number of laptops sold is 5:3. How many laptops did the store bring in?

Let's leave x sets. 5:3 = x: 18, & nbsp; 3x = 5 × 18 & nbsp; & nbsp; X = 30; 18 + 30 = 48 (sets); a: this store shipped 48 laptops in total

The store brought in a batch of TV sets and sold 18 sets. The ratio of the number sold to the number left is 6:5. How many TV sets were brought in?

Set up and transport x stations
There are 18 / (x-18) = 6 / 5
The solution is x = 33
33 units

The store brought in a batch of air conditioners and sold 24 sets. The ratio of the number sold to the number left is 3:5. How many air conditioners do you want?

Suppose the total number is x, according to the subject conditions: 24 / x = 3 / (3 + 5), x = 64. It's very simple