Помогите пожалуйста
Номер 7

Ответ:

Пошаговое объяснение:

1)

6x + 15 - 4x + 17 = 0

2x + 32 = 0

2x = -32

x = -32 : 2

x = -16

2)

-18y + 6 + 15y + 5 = 20

-3y + 11 = 20

-3y = 20 - 11

-3y = 9

y = 9:(-3)

y = -3

3)

54 - 12x + 28x + 21 = -23

16x + 75 = -23

16x = -23 - 75

16x = -98

x = -98 : 16

x = -6,125

4)

8x + 12 - 18 - 6x - x = -6

x - 6 = -6

x = -6+6

x = 0

5)

-9y + 36 + 8y + 24 + 23 = -9

-y + 83 = -9

y = 83+9

y = 92

6)

20y - 12 - 10 + 20y - 7 = -149

40y -29 = -149

40y = -149 + 29

40y = -120

y = -120 : 40

y = -3