Решите пропорцию 2/2-x=7/4.5-4x и еще 1 2/x+1=10/3x+3 целых2/9

1) 2 (4,5 - 4x) = 7 (2 - x)

9 - 8x = 14 - 7x

-8x + 7x = 14 - 9

-x = 5 | * (-1)

x = - 5

2) 10 (x + 1) = 2 (3x + 3 2/9)

10x + 1 = 6x + 6 4/9

10x - 6x = 6 4/9 - 1

4x = 5 4/9

x = 5 4/9 : 4

x = 12,25

решите пропорцию

2/2-x=7/4.5-4x

2 * (4,5-4x) = 7 * (2-x)

9-8x=14-7x

-8x+7x=14-9

-x=5

x=-5

и еще

12/x+1=10/3x+3 2/9

12 * (3x+29/9) = 10 * (x+1)

36x+116/3 = 10x+10

36x-10x=10 - 116/3

26x = 30/3 - 116/3

26x = - 86/3

x=-86/3*1/26

x = - 43/39

x = - 1 4/39