There are 750 students in Guangming primary school. The number of boys is 1.5 times more than that of girls. How many boys and girls are there? (solving equations)

If the number of girls is x, then the number of boys is 1.5x + 30
x+1.5x+30=750
2.5x=720
x=288
288×1.5+30
=432+30
=462 (people)
A: there are 462 boys and 288 girls

There are 750 students in Guangming primary school. The number of boys is 1.5 times more than that of girls. How many boys and girls are there? (solving equations)

If the number of girls is x, then the number of boys is 1.5x + 30
x+1.5x+30=750
2.5x=720
x=288
288×1.5+30
=432+30
=462 (people)
A: there are 462 boys and 288 girls

There are 330 students in Hongwei hope primary school, of which the number of boys is 20% more than that of girls. How many girls are there in this school

There are x girls in this school. According to the meaning of the question, x + X (1 + 20%) = 330, x = 150. Answer: there are 150 girls in this school

The number of girls in class 6 (1) accounts for 3 / 5 of the total number of students in class 6 (1)? Come on

5-3=2
3-2=1
11 △ 1 = 11 (person)
11 * 5 = 55 (person)
Hope to adopt, thank you

There are 42 students in a class. One fourth of the boys are equal to one third of the girls. How many boys are there in this class? No equations

1 / 4 boys = 1 / 3 girls
So the ratio of boys to girls is 1 / 3:1 / 4 = 4:3
42 / 7 × 4 = 24 boys
Or think of boys as unit 1
So girls have (1 × 1 / 4) / (1 / 3) = 3 / 4
So there are 42 / (1 + 3 / 4) = 24 boys

There are 52 students in class 3 of 6 years. The number of boys is 8% more than that of girls. How many boys and girls are there in this class?

Suppose the number of women is X. then the number of boys is x * (1 + 8%)
The whole formula is: x + X * (1 + 8%) = 52
25 for girls and 25 * (1 + 8%) = 27 for boys
This is an equation. I wonder if you have learned it
If you haven't learned the equation, you can understand this formula: 52 / (1 + 1.08) = 25

There are 51 students in our class, of which 25 are boys. What percentage of the total number of girls is female

50.98%

There are 120 girls in the first grade of Guangming primary school, of which 4 are boys 9. How many students are there in grade one?

120÷（1-4
9）
=120÷5
9，
=216 (people)
A: there are 216 students in grade one

There were 42 students in class 6 (1), of whom 4 out of 7 were boys. Later, a number of girls were transferred. At this time, the ratio of boys to girls was 6:5. Now the whole class is female There are () people born

Let's get y girls
42 * (1 - 4 / 7) = 18
42-18 = 24
24:(18+y)=6:5
6*(18+y)=5*24
108+6y=120
6y=12
Y=2
18 + 2 = 20
A: briefly

There are 24 boys in class 6 (1) and 5 / 6 girls in class 6 (1)

44,
24 divided by 6 times 5 + 24

There are 750 students in Guangming primary school. The number of boys is 1.5 times more than that of girls. How many boys and girls are there? (solving equations)