Question

помогите прошу нужно решить 7 примеров за 100 балов

Answer 1

Ответ:

Пошаговое объяснение:

-3/9х + 2/3х - 1/2х = 7/12

-12/36х + 24/36х - 18/36х = 7/12

- 6/36х = 7/12

- 1/6х = 7/12

х = 7/12 : ( - 1/6)

х = 7/12 * (-6)

х = - 7/2

х = - 3 1/2

- 3/4( 1/6х - 1/3) = 2х - 11 1/2

- 1/8х + 1/4 = 2х - 11 1/2

-1/8х - 2х = - 1/4 - 11 1/2

- 3 1/8 х = - 11 3/4

х = -47/4 : (-25/8)

х =  - 47/4 * ( - 8/25)

х =  94/25

х = 3 19/25

- 2/3( 1/3х - 1/2) = 4х + 2 1/2

-2/9x + 1/3 = 4x + 2 1/2

- 4x - 2/9x = -1/3 + 2 1/2

- 4 2/9x = - 2/6 + 15/6

- 4 2/9x = 13/6

x = 13/6 : (-38/9)

х = 13/6 * (-9/38)

х= - 39/76

- 2 3/7х + 3 5/6х - 1 8/21х = 1/2

-102/42х + 161/42х - 58/42х = 1/2

1/42х = 1/2

х = 1/2 : 1/42

х = 1/2 * 42

х = 21

4*(-3) - 12х = 3( 2- х) +7

-12 - 12х = 6 - 3х + 7

-12х + 3х = 13 + 12

- 9х = 25

х= 25 : ( -9)

х = - 2 7/9