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The school has organized tree planting activities. It is known that there are 23 people planting trees in place a and 17 people planting trees in place B. now 20 people are transferred to support, so that the number of people planting trees in place a is more than twice that of place B. how many people should be transferred to place a and place B?
If x persons are transferred to B, then 20-x persons are transferred to a. the equation is: 2 (17 + x) + 3 = 23 + 20-x & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 2; 20-2 = 18 persons. A: 18 persons are transferred to a, and 2 persons are transferred to B
The school organizes tree planting activities. It is known that there are 27 trees planted in place a and 18 trees planted in place B. if the number of trees planted in place a is twice that of place B, how many people need to be transferred from place B to place a?
According to the meaning of the question, we get 27 + x = 2 (18-x), and the solution is x = 3
RELATED INFORMATIONS
- 1. The school has organized tree planting activities. It is known that there are 23 people planting trees in place a and 17 people planting trees in place B. now 20 people are transferred to support, so that the number of people planting trees in place a is more than twice that of place B. how many people should be transferred to place a and place B?
- 2. In another tree planting activity, the total index of the two groups is the same, which is more than 100 trees. It is known that the number of people in the two groups is different. In the first group, one person planted 5 trees and the others planted 13 trees; in the second group, one person planted 4 trees and the others planted 10 trees. How many people are there in the two groups? Arithmetic and equation are OK. Please make it clear to me I want formula, formula
- 3. If the seventh grade students are allowed to do it alone, it will take 7.5 hours to complete. If the eighth grade students are allowed to do it alone, it will take five hours How much time does it take to finish the rest of the work if the seventh and eighth grade work together for one hour, and then the eighth grade finish the rest of the work alone? (solve the equation with one variable once)
- 4. The sixth grade students took part in the tree planting activities. 42 students planted 104 trees. The average boy planted 3 trees and the girl planted 2 trees. How many boys and girls are there?
- 5. In the tree planting activities, each student in Grade 6 plants 8.5 trees on average. If men and women are calculated separately, then boys plant 10 trees on average and girls plant 6 trees on average. What percentage of the total number of girls in this grade? fast
- 6. On Sunday, Xiao Ming and seven classmates, a total of 8 people, went on an outing. On the way, he spent 20 yuan to buy drinks. The store only had coke and milk tea. It is known that coke costs 2 yuan a cup and milk tea costs 3 yuan a cup. If 20 yuan is just used up. (1) how many ways to buy? How many cups of cola and milk tea in each way? (2) When each person has at least one drink and at least two milk teas, how many ways to buy them?
- 7. There was a child who bought coke and had three empty bottles to exchange for one. The child bought 10 bottles and asked him how many bottles he could drink?
- 8. Eight people go for an outing and spend 20 yuan to buy Coke and milk tea. It is known that coke costs 2 yuan and milk tea costs 3 yuan. If 20 yuan is just used up, there are several ways Using the system of linear inequalities of one variable to solve
- 9. A kind of milk, each bottle price is a yuan, supermarket in order to promote sales, buy two get one free, now each bottle of milk together () yuan?
- 10. A box of milk 12 packets, the price is 42 yuan. Supermarket a launched a promotional campaign to buy a box of milk to send two packets of milk, supermarket B the same milk 15% discount, ask which is cheap
- 11. The students took part in the tree planting activities. There were 8 students in the first group, with an average of 5 trees per person. There were 6 students in the second group, with a total of 44 trees. How many trees did each student plant in the second group?
- 12. On tree planting day, boys plant 80 more trees than girls. On tree planting day, boys plant 60%. How many trees do boys and girls plant
- 13. On the tree planting day, each student of a class plants 6 trees on average. If it is done by girls alone, each student should plant 15 trees, then it is done by boys alone, and each student should plant () A. 9 trees B. 10 trees C. 12 trees D. 14 trees
- 14. March 12 is the tree planting day. 170 students of grade three take part in the voluntary tree planting activities. If the average boy can dig three tree pits a day, and the average girl can plant seven trees a day, just to plant a tree in each tree pit, how many men and women are there in that grade?
- 15. A class is going to plant trees on tree planting day If each student plants 14 saplings, the remaining 20 saplings will not be planted. If each student plants 15 saplings, an additional 11 saplings will be prepared. How many students are there in this class?
- 16. Tree planting activities were held in a school tree planting day. 336 trees were planted in Grade 5. The number of trees planted in Grade 6 was 8 times more than that in Grade 5. How many trees were planted in Grade 6
- 17. 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
- 18. How to prevent soil erosion?
- 19. During the tree planting day, a total of 834 trees were planted in the two schools. The number of trees planted in Haishi middle school was three times less than that in Lidong middle school. How many trees were planted in each school?
- 20. During the tree planting day, a total of 834 trees were planted in the two schools. The number of trees planted in Haishi middle school was three times less than that in Lidong middle school. How many trees were planted in each school?