Question

1)7:21=x:3 , 2)3:y=9:12 , 3)x:3=7:6,4)8:x=24*5​

Answer 1

1) 7/21=х/3

3×7=21×х

х=1

2)3/у=9/12

3×12=9×у

36=9у

у=4

3) х/3=7/6

6х=7×3

21=6х

х=3.6

4)8/х=25×5

х=8/120=1/15

Answer 2

Ответ:

1) x=1

2)y=4

3)x=7/2

4)x=1/15

Пошаговое объяснение:

Вот

Answer 3

Let's solve each of these equations one by one:

1. 7:21 = x:3

To solve this proportion, we can cross-multiply:

7 * 3 = 21 * x 21 = 21x

Now, divide both sides by 21 to solve for x:

21x/21 = 21/21 x = 1

Therefore, the solution is x = 1.

2. 3:y = 9:12

Cross-multiplying:

3 * 12 = 9 * y 36 = 9y

Divide both sides by 9:

36/9 = 9y/9 4 = y

So, the solution is y = 4.

3. x:3 = 7:6

Cross-multiplying:

x * 6 = 3 * 7 6x = 21

Divide both sides by 6:

6x/6 = 21/6 x = 3.5

The solution is x = 3.5.

4. 8:x = 24 * 5

Cross-multiplying:

8 * (24 * 5) = x 960 = x

The solution is x = 960.

Therefore, the solutions to the given equations are:

1. x = 1
2. y = 4
3. x = 3.5
4. x = 960.