Ответ:

Пошаговое объяснение:

9x - 7 = 6x + 14

9x - 6x = 14 + 7

3x = 21

x = 21 : 3

x = 7

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3(4 - 2x) + 6 = -2x + 4

12 - 6x + 6 = -2x + 4

18 - 6x = -2x + 4

6x - 2x = 18 - 4

4x = 14

x = 14 : 4

x = 3,5