Question

Помогите пожалуйста алгебра 1-4

Answer 1

Ответ:

1) 17 - 2х = 5 - 6х

-2х + 6х = 5 - 17

4х = -12

х = -12 : 4

х = -3

2) 2 (4х - 5) = 2х + 8

8х - 10 = 2х +8

8х - 2х = 10 + 8

6х = 18

х = 18 : 6

х= 3

3) 3х - 10 = 5х + 2 (4х + 5)

3х - 10 = 5х + 8х + 10

3х - 8х -5х = 10 +10

-10 х = 20

х = 20 : (-10)

х = -2

4) 6х - 6(2х + 5) = 4 (5х-1)

6х - 12х - 30 = 20х - 4

6х-12х-20х = 30 - 4

-26х = 26

х = 26 : (-26)

х = -1