Solve the equation... 9 / 5 x-x = 4.8

Solve the equation... 9 / 5 x-x = 4.8

9x-x = 4.8
9x/5-x=4.8
General division
9x-5x=4.8*5
4x=4.8*5
x=4.8*5/4
x=1.2*5
x=6

On May Day, the sales of home appliances were 2100 yuan, 30% less than the original price. The ratio of the first day to the second day was 5:3. In fact, 54 units were sold on the first day, 20% more than the original plan, and the profit was 3200 yuan?

First day plan = 54 ÷ (1 + 20%) = 45 days
The next day plan = 45 △ 5 × 3 = 27 units

0 degrees centigrade is 32 degrees Fahrenheit, 100 degrees centigrade is 212 degrees Fahrenheit, so how much is 1 degree centigrade?

Conversion relationship between F and T: F = (9 / 5) × T + 32
Then 1 ℃ is equal to Fahrenheit: F = (9 / 5) × 1 + 32 = 33.8 ℃

How to solve the problem of 8 / 9x = 16 / 27?
How to solve 2 / 3x = 1 / 12?

8/9X=16/27
x=(16/27)÷(8/9)
x=(16/27)×(9/8)
x=(16×9)/(27×8)
x=2/3
2/3X=1/12
x=(1/12)÷(2/3)
x=(1/12)×(3/2)
x=(1×3)/(12×2)
x=1/8
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Xiaoying plans to finish reading a book in three days. On the first day, she reads 40% of the whole book. The ratio of the second day to the third day is 5:7. On the second day, she reads 30 pages less than the first day. How many pages altogether
Formula
solve equations

The equation can be given by the question
If there are x pages in the whole book, you can see 0.4 × x page on the first day, 0.4 × X-30 page on the second day, and 7 / 5 (0.4 × X-30) page on the third day
So: 0.4 × x + 0.4 × X-30 + 7 / 5 (0.4 × X-30) = X
0.8X+1.4×0.4X-30-30×1.4=X
1.36X-72=X
0.36X=72
The solution is x = 200 pages

What is 64 degrees Fahrenheit equal to?

The conversion formula of centigrade temperature and Fahrenheit temperature is: 5 (F - 32) = 9 (c), where f - Fahrenheit temperature, C - centigrade temperature. Fahrenheit = 32 + centigrade × 1.8 centigrade = (Fahrenheit - 32) △ 1.8 the measurement value of temperature measures the temperature. 40 centigrade = 104 Fahrenheit, f = 32 + (9 / 5) times

5 (x + 10) - 6 (2x-15) = 4 (3x + 16) + 19

Original formula = 5x + 50-12x + 90 = 12x + 64 + 19
19x = 57
We get x = 3
Study hard, these problems should be done by yourself

Li Gang plans to finish reading a book in three days. On the first day, he read two fifths of the book. On the second and third day, the ratio of pages is 4:3. On the third day, he read six times less than on the second day
How many pages are there in this book

Last 2 days = 6 ÷ (4-3) × (4 + 3) = 42 Pages
Total = 42 (1-2 / 5) = 70 pages

How much is one degree Fahrenheit equal to?

Fahrenheit is smaller than centigrade. A Fahrenheit is equal to 5 / 9 centigrade. It's easy to convert from centigrade to Fahrenheit. Just multiply 9, divide by 5, and add 32. For example, your body temperature is 37 centigrade. 37 times 9 equals 333. Divide by 5 equals 66.6.32 and 66.6 equals 98.6. This is the Fahrenheit of your body temperature

Simple calculation of 58 × 17 + 18 × 83 and 526 × 99 + 526

58×17+18×83
=40×17+18×17+18×83
=680+18×（17+83）
=680+1800
=2480
526×99+526
=526×（99+1）
=526×100
=52600