Ответ:

Пошаговое объяснение:

2)

13-(2x - 5) = x - 3

13 - 2x + 5 = x - 3

18 - 2x = x - 3

x + 2x = 18 + 3

3x = 21

x = 21:3

x = 7

4)

26-(17 - 2x) = 5x

26 - 17 + 2x = 5x

9 + 2x = 5x

5x - 2x = 9

3x = 9

x = 9:3

x = 3

Ответ:

2) 7, 4) 3

Пошаговое объяснение:

2) 13 – (2x – 5) = x – 3

13 – 2x + 5 = x – 3

2x + x = 18 + 3

3x = 21

x = 21 : 3

х = 7

4) 26 – (17 – 2х) = 5х

26 – 17 + 2х = 5х

5х – 2х = 9

3х = 9

х = 9 : 3

х = 3