The number of the first team is 38 less than twice that of the second team. 10 people are transferred from the first team to the second team, and half of the original number of the second team is transferred to the first team The number of first and second teams I've made an equation, but there's something wrong with it

The number of the first team is 38 less than twice that of the second team. 10 people are transferred from the first team to the second team, and half of the original number of the second team is transferred to the first team The number of first and second teams I've made an equation, but there's something wrong with it

If there are two teams of X people, one team of 2x-38 people
2x-38-10+x/2=x+10-x/2+6
Multiply both sides by two
4x-76-20+x=2x+20-x+12
4x=128
x=32
2 × 32-38 = 26 (person)
A: there are 26 people in the first team and 32 people in the second team

There are two engineering teams. The first team has 50 people, and the second team has 12 people less than the first team. Due to the need of tasks, the number of the first team is required to be two times more than the number of the second team
How many people should be transferred from the second team to support the first team

50-12 = 38
The solution needs to transfer x people
(38-X）X(2+1)=50+X
38X3-3X=50+X
114-50=4X
4X=64
X=16

The number of the first team is 38 less than twice that of the second team. If 10 people are transferred from the first team to the second team and half of the original two teams are transferred to the first team, then the new team will be better than the new team
More than 6 people, how many people are there in the original first team and the original second team
I can't figure it out?

Suppose the number of the first team is: X, then the number of the second team is: 2x-38. According to the meaning of the question, the number of the new team is: X-10 + (2x-38) / 2, the number of the new team is: (2x-38) / 2 + 10, then: (X-10 + (2x-38) / 2) - ((2x-38) / 2 + 10) = 6x-10 + x-19-x + 19-10 = 6x-20 = 6x = 26

The ratio of class A to class B is 4:5. Class A transfers 2 / 7 to class B. class A has 92 fewer people than class B. how many people are there in class A and class B?

4÷﹙4＋5﹚＝4/9
4/9×﹙1－2/7﹚＝20/63
1－20/63－20/63＝23/63
92 △ 23 / 63 = 252 persons
Original number of class A: 252 × 4 / 9 = 112
The original number of class B: 252 × 5 / 9 = 140