Question

ПООЧЕРЕДНОЕ РЕШЕНИЕ СРОЧНО НУЖНО

Answer 1

Пошаговое объяснение:

№1

7 1/2 : 4 1/2 = х : 3/25

4 1/2 * х = 7 1/2 * 3/25

9/2х = 15/2 * 3/25

9/2х = 3/2 * 3/5

9/2х = 9/10

х = 9/10 : 9/2

х = 9/10 * 2/9

х = 2/10

х = 1/5

№2

24/(х + 2) = 1/5

1 * (х + 2) = 5 * 24

х + 2 = 120

х = 120 - 2

х = 118

№3

(у - 5)/6 = 4/3

3(у - 5) = 4 * 6

3у - 15 = 24

3у = 24 + 15

3у = 39

у = 39 : 3

у = 13

№4

2/5 = 6/(х + 3)

2 * (х + 3) = 5 * 6

2х + 6 = 30

2х = 30 - 6

2х = 24

х = 24 : 2

х = 12

№5

5/6 = 15/(2х - 3)

5(2х - 3) = 6 * 15

10х - 15 = 90

10х = 90 + 15

10х = 105

х = 105 : 10

х = 10,5

№6

12 : 4/5х = 20 : 1/4

20 * 4/5х = 1/4 * 12

80/5х = 12/4

16х = 3

х = 3 : 16

х = 3/16