There are two classes in Grade 6 of a school. The number of students in class 6 (1) is three twentieth more than that in class 6 (2). If three students are transferred from class 6 (1) to class 6 (2), the number of students in the two classes is exactly the same How many people are there in each class?

If three people are transferred from class six (1) to class six (2), the number of people in the two classes is exactly the same,
Then class 6 (1) is 3 * 2 = 6 more than Class 6 (2)
Six (1) number of people: 6 / (3 / 20) = 40 (people)
6 (2): 40-6 = 34 (persons)

There are three classes in the fifth grade of a primary school. Generally, the number of students in the third class is equal to that in the second class. The number of students in the third class accounts for seven twentieth of the whole grade, and three more than that in the first class,
How many people are there in grade five? Please give me the answer and the process today. Thank you!

120
1-7/20=13/20
13/20/2=13/40
17/20/13/40=1/40
3/1/40=120

The number of boys is 6 more than that of girls, just one third of the number of girls. How many students are there in this class

If the number of female students is x, then 1 / 3x = 6, x = 18. If the number of male students is 6 more than that of female students, then the number of male students is 18 + 6 = 24. There are 18 + 24 = 42 students in this class

There are two classes in grade six. The number of students in class one is 20% more than that in class two. If 12 students are transferred from class one to class two, the ratio of the two classes is 9:13. How many students are there in each class?

The original ratio of the two classes is: (1 + 20%): 1 = 120%: 1 = 12:10; then the total number of the two classes is: 12 △ (1212 + 10-99 + 13) = 12 △ (1222-922), = 12 △ 322, = 88 (people). Then the original number of the first class is: 88 × 1212 + 10 = 88 × 1222 = 48 (people); the original number of the second class is: 88-48 = 40 (people). Answer: there are 48 people in the first class and 40 people in the second class

There are 50 people in the two classes. Class A is 1 / 5 more than class B. what is the proportion of class A in the total number of the two classes?

6/11

The average number of students in class A and class B is 43. Class A has four more students than class B. how many students are there in class A and class B? Suppose there are x people in class B, and the equation is ()
A. 43×2-x=4B. 43×2+4=2xC. x+（x+4）=43×2

According to the stem analysis, if there are x people in class B, then class A is x + 4 people. According to the meaning of the question, we can get the equation: x + X + 4 = 43 × 2, & nbsp; & nbsp; 2x = 82, & nbsp; & nbsp; & nbsp; & nbsp; X = 41, then class A is 41 + 4 = 45 (people). A: Class A and class B have 41 and 45 people respectively

There are 90 students in class A and class B. the number of students in class A is six times less than that in class B. how many students are there in class A and class B

There are 32 students in class B and 58 students in class A

There are 152 students in class A, class B and class C. The ratio of class A and class B is 9:8. Class C has two more students than class B. how many students are there in each of the three classes?

152—2=150
9+8+8=25
150 △ 25 = 6 (person)
A: 6x9 = 54 (person)
B: 6x8 = 48 (person)
C: 48 = 2 = 50 (person)

88=64 79=63/1010=100 911=99/1212=144 1113=143
What rules do you find in it?

The wind is cheering
Rule: n ^ 2-1 = (n + 1) (n-1)
Note: how to solve such problems
1. The methods of solving these problems are based on the formulas learned in junior high school
For example, (a + b) ^ 2 = a ^ 2 + 2Ab + B ^ 2
(a-b)^2=a^2-2ab+b^2
(a+b)(a-b)=a^2-b^2
2, or n (n + 1) / 2
3,n(n-1)/2
4,4n-4

What is 12 out of 13 times 2

24 out of 13