How about 5x * 5 / 3

How about 5x * 5 / 3

5x * 5 / 3 is only 25 / 3x,

How to calculate 3.5x-9 + 5.5 = 0
To solve the equation

3.5x-9+5.5=0
3.5x-3.5=0
3.5x=3.5
x=1

How to solve 5.5x-3.5x = 20

5.5x - 3.5x = 20
(5.5 - 3.5)x = 20
2x = 20
x = 20÷2
x = 10

Xinhua Bookstore brought in a batch of new books, of which comic books accounted for 52 / 100, and the rest were story books, 136 less than comic books
How many new books are there in the shipment?

Storybooks account for 20% of the total
1－52％＝48％
The new books are in total
136 (52% - 48%) = 3400 copies

What year is 1998? Is it a leap year or a normal year

Ordinary year
If you divide the number of years by 4, you can divide leap years

13 / 15 times 3 / 13 △ 1 / 5 times 1 / 5 for a simple algorithm!

Reorder the numerator and denominator
Original formula = (13 * 3 * 5 * 1) / (15 * 13 * 1 * 5)
= （13/13） * （3/15） * （5/5）
= 1/5
= 0.2

After Xiaogang gave his brother four exercise books, he had two more exercise books than his brother. It turned out that his brother was less than Xiaogang______ There are two exercise books

4 × 2 + 2, = 8 + 2, = 10 (pieces), a: my younger brother has 10 exercise books less than Xiao Gang, so the answer is: 10

English translation
Prague square is a good place for sightseeing

To go sightseeing for journey
Prague Square is a good place to go sightseeing for journey.

A snowboard is 2 meters long, 20 cm wide and weighs 1kg. When a person with a weight of 60kg is skiing on it, the pressure and pressure on the snow are calculated
G takes 10N / kg. This is one of our test questions. I checked it on the Internet. Only the board width is 10cm, which is calculated according to two boards. If it is not 20cm, I will calculate it according to one board. Do you want us to calculate single board or double board?

Snowboard is 20cm wide. It's different from the one you imagine. The snowboard in the title should be similar to the one with two feet on one board

There is an empty cuboid container a 40 cm long, 30 cm wide and 20 cm high, and a water container B 35 cm long, 30 cm wide and 24 cm deep
M now pour part of the water in container B into container a. the height of the water surface in the two containers is equal. How many centimeters should the water depth be?
(write the calculation process)

35×30×24=25200
25200 ÷ (40 × 30 + 35 × 30) = 11.2 (CM)
A: at this time, the water depth should be 11.2 cm