There are 34 students in a certain class, and the boys are 8 fewer than the 3 4 girls

In fact, the key to this topic lies in understanding, and if we understand these words clearly, this topic is very easy to solve. The first sentence is a total of 34 people. The second sentence is that there are eight fewer boys than three-quarters of girls.

Based on these two sentences, we can get such an equation. Number of boys + number of girls = 343 4 Number of girls - 8 + number of girls = 34

Number of girls = 42 7 4 = 42 4 7 = 24.

So the final answer to this question is that the number of girls is 24.

There are x number of female students. According to the title, it can be listed: (34-x) = 3x 4-8

Solve the equation 7x 4=42

x=24 (person), so there are 24 girls.

There are x number of female students and 34 x male students.

34－x）=3/4x－8

7/4x=42

x=24 so there are 24 girls.

The answer is: 24 girls. Suppose the girl is a person, and the boy is 3 4 a 8. Then the boys plus the girls equals 34. That is, a+3 4 a-8=34. Just solve the solution in the formula.

According to the meaning of the title, girls are multiples of 4.

Boys = 3 4 girls — 8.

Boys + girls = 3 4 girls - 8 + girls = 34.

So 7 4 girls = 42.

Girls = 24.

Boys = 10 people.

Set the number of girls to x.

3/4x-8+x=34

7/4x=42

x=42 4 7=24 (person).

A: There are 24 girls.

Let the number of boys be x

4/x=3/24

x=32, so the total number of people is 32+24=68.

If there are only boys and girls in the class, and there are no people of unknown gender, this question is solved like this) Let the number of boys be x, then the number of girls (51-x).

2/3)x=(3/4)(51-x)

x=2751-x=24

Question 1, Male x people, Female Y people, 3 4x = 2 3y, x + y = 51 24 boys, 27 female students.

I didn't understand the second question, the equation 120 (1+1 5)=120 6 5=144120 (1-1 5)=120 4 5=96

Let the girls be x and the boys 51-x

2/3x=3/4(51-x)

8x=9*51-9x

17x=9*51

x=9*51/17

x=27 boys 51-x=51-27=24.

Solution: Let the number of boys be x, then the number of girls is (3 4x) (2 3) from the question: (3 4x) (2 3) + x=51 to get x=24

There are 24 boys and 51-24=27 girls.

If the number of boys is x and the number of girls is y, then the system of equations is x+y=51,3 4x=2 3y, and the solution is x=24, y=27, then there are 24 boys and 27 girls.

A: There are 24 boys and 27 girls. If the boy is x, the girl is 51-x; Formula: 3 4x=2 3(51-x); If the solution is x=24, the girl is 51-24=27 people.

Analysis: Boys 3 4=Girls 2 3

The unified unit "1" is based on the number of male students

Boys: 1 Girls: 3 4 2 3 = 9 8

Number of boys: 51 (1 + 9 8) = 24 (people) Number of girls: 24 9 8 = 27 (people).

Hit: 24 boys, 27 girls.

Set up x number of girls.

2/3x+20=4/5(465-x)

2/3x+20=372-4/5x

4/5x+2/3x=372-20

22/15x=352

x = 240 people.

There are few boys. 240x2-465=15 people.

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Solution: If the boy has x individuals, then the girls have y people.

x+y=465 ①

2/3y+30=3/4x ②

It can be reduced to 9x-8y=360

8 got. 17x=4080

x=240 substitute x=240 to get: y=225

System of equations solution {x=240 y=225

A: There are 225 girls and 240 boys.

This is a binary equation solving problem. Let there be x girls and y boys, x+y=465,3 4y-2 3x=30Just solve this x and y... x=225 y=240 .

Boy 240 girl 225, process: let the girl x person boy y person, x+y=465, x=465-y, 3 4y-2 3x(465-y)=30, the solution is y=240, and the solution is x=225 by substituting 240 into the first formula

Hahahaha, look, there really is a tragedy here!!

Elementary school, good boy.

There are x number of girls and 465-x number of boys.

2|3x+20=(465-x)4|5

Answer: 240 for girls

Boys 225

Number of girls: 54 (1+4 5)=30.

Number of boys: 54-30=24.

Normalization:

Boys: 4*6=24 (people).

Girls: 5*6=30 (person).

There are 24 boys and 30 girls.