Ответ:

1) 11x+4=70

11x=70-4

11x=66

x=6

Ответ:

Пошаговое объяснение:

1) (11x + 4) ÷ 5 = 14

11x + 4 = 14*5

11x + 4 = 70

11x = 70 - 4

11x = 66

x = 66:11

x = 6

2) 60÷(51-3x) = 2

51 - 3x = 60 : 2

51 - 3x = 30

3x = 51 - 30

3x = 21

x = 21:3

x = 7

3) 300 - (3x + 43) ÷ 20 = 295

(3x + 43) : 20 = 300 - 295

(3x + 43) : 20 = 5

3x + 43 = 5*20

3x + 43 = 100

3x = 100 - 43

3x = 57

x = 57 : 3

x = 19

4)

600 ÷ (5x - 43) + 27 = 77

600 : (5x - 43) = 77 - 27

600 : (5x - 43) = 50

5x - 43 = 600 : 50

5x - 43 = 12

5x = 12 + 43

5x = 55

x = 55 : 5

x = 11

5)

140-(x ÷ 7 + 29)×4 = 12​

(x : 7 + 29) *4 = 140 - 12

(x : 7 + 29) *4 = 128

x : 7 + 29 = 128 : 4

x : 7 + 29 = 32

x : 7 = 32 - 29

x : 7 = 3

x = 3 * 7

x = 21