Question

X:8/9=3:4      х:2,8=5:7     6:5=9:х

Answer 1

1) х = 3/4 *8/9 =2/3
2 х = 28/10 * 5/7 = 2
3) х = (5*9)/6 = 15/2

Answer 2

Х÷8/9=3÷4
4х=8/9 ×3
4х=8/3
х=8/3 ×4
х=2/3

х÷2,8=5÷7
7х=2,8 ×5
7х=14
х=2

6÷5=9÷х
6х=5×9
6х=45
х=7,5

Answer 3

To solve the equations, we can use the concept of proportionality.

1. X:8/9=3:4 We can cross-multiply to get:

4X = 8/9 * 3 4X = 8/3 X = (8/3) * (1/4) X = 2/3

Therefore, X = 2/3.

2. X:2.8=5:7 We can cross-multiply to get:

7X = 2.8 * 5 7X = 14 X = 14/7 X = 2

Therefore, X = 2.

3. 6:5=9:X We can cross-multiply to get:

6X = 5 * 9 6X = 45 X = 45/6 X = 7.5

Therefore, X = 7.5.

So the solutions are: X = 2/3, X = 2, X = 7.5.