1) 5(3х-7)-3(4х+8)-х+65=77; 2) 3(4х+8)-5(2х-65)-83=-96; 3)-8(5х-7)+6(8х-3)-3х+18=-44; 4)7(3х+6)-9(2х-3)-9=-21

Ответ:

Пошаговое объяснение:

1)

5(3х-7)-3(4х+8)-х+65=77;

15x - 35 - 12x - 24 - x + 65 = 77

2x + 6 = 77

2x = 77 - 6

2x = 71

x = 71 : 2

x = 35,5

2)

3(4х+8)-5(2х-65)-83=-96;

12x + 24 - 10x + 325 - 83 = -96

2x + 266 = -96

2x = -96 - 266

2x = -362

x = -362 : 2

x = 181

3)

-8(5х-7)+6(8х-3)-3х+18=-44;

-40x + 56 + 48x - 18 - 3x + 18 = -44

5x + 56 = -44

5x = -44 - 56

5x = -100

x = -100 : 5

x = -20

4)

7(3х+6)-9(2х-3)-9=-21

21x + 42 - 18x + 27 - 9 = -21

3x + 60 = -21

3x = -21 - 60

3x = -81

x = -81 : 3

x = -27