Пошаговое объяснение:

№2

а)

-1/9х = -1/3

х = -1/3 : (-1/9)

х = -1/3 * (-9/1)

х = 9/3

х = 3

б)

6. 5/9х - 5 = 7х - 4. 1/3

6. 5/9х - 7х = -4. 1/3 + 5

6. 5/9х - 6. 9/9х = -4. 1/3 + 4. 3/3

-4/9х = 2/3

х = 2/3 : (-4/9)

х = 2/3 * (-9/4)

х = 1/1 * (-3/2)

х = -3/2

х = -1. 1/2

в)

(5х + 6) - (8 - х) = -26

5х + 6 - 8 + х = -26

6х - 2 = -26

6х = -26 + 2

6х = -24

х = -24 : 6

х = -4

№4

а)

14 - 5*(3х + 7) = 7*(2х - 3)

14 - 15х - 35 = 14х - 21

-15х - 21 = 14х - 21

-15х - 14х = -21 + 21

-29х = 0

х = 0

б)

(2х + 3)/5 - (4х + 1)/2 = 1 | * 10

2*(2х + 3) - 5*(4х + 1) = 10 * 1

4х + 6 - 20х - 5 = 10

-16х + 1 = 10

-16х = 10 - 1

-16х = 9

х = 9 : (-16)

х = -9/16

№6

|2 - |4х + 1|| = 5

1)

2 - |4х + 1| = 5

|4х + 1| = 2 - 5

|4х + 1| = -3

х Є ∅

2)

2 - |4х + 1| = -5

|4х + 1| = 2 - (-5)

|4х + 1| = 2 + 5

|4х + 1| = 7

1.

4х + 1 = 7

4х = 7 - 1

4х = 6

х = 6 : 4

х1 = 1,5

2.

4х + 1 = -7

4х = -7 - 1

4х = -8

х = -8 : 4

х2 = -2