The ratio of people in workshop a and workshop B is 5:4. If 21 people are transferred from workshop a to workshop B, their ratio is 2:3. How many people are there in workshop a and workshop B

The ratio of people in workshop a and workshop B is 5:4. If 21 people are transferred from workshop a to workshop B, their ratio is 2:3. How many people are there in workshop a and workshop B

Suppose that there are 5x people in workshop a and 4x people in workshop B. The equation is as follows:
(5x-21)/(4x+21)=2/3
15x-63=8x+42
x=15
A: 15 * 5 = 75
B: 15 * 4 = 60
A: there were 75 people in workshop a and 60 people in workshop B
I hope my answer can help you!
If the number of people in workshop a and workshop B is 5x and 4x respectively, the following equation can be listed:
(5x-21)/(4x+21) = 2:3
We can get x = 15
So there are 75 people in workshop a and 60 people in workshop B.
Do you think the above results are OK?
A 125; B 60
The transport team transported a batch of rice to the disaster area. In the morning, it took 4 trucks to transport 25, with an average of 20% per truck______ What about the rest of the rice______ The car can't be finished
How many parts of this batch of rice can be transported by each truck on average: 25 △ 4, = 25 × 14, = 110; how many trucks can the rest of the rice be transported by: (1-25) △ 110, = 35 △ 110, = 6 (trucks); a: 110 of this batch of rice can be transported by each truck on average, and the rest of the rice can be transported by 6 trucks
A pile of five tons of coal is transported in eight times. What is the average weight of the pile? What is the average weight of the pile?
A pile of five tons of coal is transported in eight times, with an average of 1 / 8 of the pile transported each time. The average weight of each transportation is 5 tons, 1 / 8
It's all 1 / 8
The ratio of the number of people in workshop a and workshop B is 5:4. If 21 people are transferred from workshop a to workshop B, the ratio of the number of people in workshop a and workshop B is 2:3
How many people were there?
The total number remained unchanged
It turns out that a is the total 5 (5 + 4) = 5 / 9
Now a is the total 2 (2 + 3) = 2 / 5
So the total number is 21 (5 / 9-2 / 5) = 135
So there were 135 x (5 / 9) = 75 people in class A
B 135-75 = 60
Originally, a accounted for 5 / (4 + 5) = 5 / 9 of the total number
Now a accounts for 2 / (2 + 3) = 2 / 5 of the total
Therefore, the total number is 21 (5 / 9-2 / 5) = 135
So there were 135 × 5 / 9 = 75 people in a
B: 135-75 = 60
To transport 58 tons of goods from place a to place B, it costs 150 yuan if you use a big truck with a load of 5 tons, 80 yuan if you use a medium truck with a load of 2 tons, and 50 yuan if you use a small truck with a load of 1 ton?
Truck freight: 150 / 5 = 30 yuan / ton
Medium truck freight: 80 / 2 = 40 yuan / ton
Small truck freight: 50 / 1 = 50 yuan / ton
Thirty
There are 45 tons of coal in a pile. It takes 10 hours for a truck to transport it. How many parts of the coal can be transported away in 4 hours?
How many hours does it take to transport 70 percent of the coal?
1.4 divided by 10 equals two fifths A: take two fifths
70% divided by two fifths = one and three fourths (hours) a
Number a is 90, one fifth of number B is equal to one seventh of number B, and number B is more than number a【
Number b = 90 × 1 / 5 △ 1 / 7 = 126
126-90=36
Number B is more than number a [36]
(126-90) △ 90 = 2 / 5
Number B is [2 / 5] more than number a (or 40%)
Thirty-six
There seems to be something wrong with the question
Number a is 90, one fifth of number B is equal to one seventh of number B, and number B is more than number a?
Should be:
Number a is 90, one fifth of number a is equal to one seventh of number B, and number B is more than number a?
Number B: 90 × 1 / 5 △ 1 / 7 = 126
（126-90）÷90=40%
If you transport 59 tons of goods, you need to pay 150 yuan if you use a 5-ton truck; if you use a 3-ton small truck, you need to pay 96 yuan. What's the least freight
Design: X Large trucks, y small trucks
5x+3y=59
x=（59-3y）/5
Because X and y are natural numbers, x = 1, y = 18, x = 4, y = 13, x = 7, y = 8, x = 10, y = 3
Freight = 150x + 96y = 1770 + 6y
The smaller the Y, the less the cost
Therefore, the cost of 10 large trucks and 3 small trucks is 1788 yuan, the least
Large calorie 150x12 = 1800
Small card to 96x20 = 1920
150X10+96X3=1788
10 large trucks and 3 small trucks are the most economical
A pile of coal weighs 50 tons, and a truck takes 10 hours to transport it. How many parts of the task can be completed in 3 hours? It takes () hours to complete 3 / 4 of the task
In a book, reading 3 / 5 of it is 30 pages less than reading 3 / 4 of it. This book has () pages in total. A rope is 3 / 5 meters long, and it cuts a section of the same length each time. After cutting it five times, it is just finished. Each section is () meters long, and each section accounts for () / () of the length of the rope
1) 3 hours to complete 3 / 10 of the task, 3 / 4 of the task to complete 7.5 hours
2) 200 pages
3) 0.1M, 1 / 6
4) Yes
One fifth of the number a is equal to one seventh of the number already counted. How many percent less is the number a than the number B
(7-5)/7=28.57%