посчитайте уравнение 2 (x - 3) - (4 - (2x + 7)) = 5

2 (x - 3) - (4 - (2x + 7)) = 5

2х - 6 - (4 - 2x - 7) = 5

2х - 6 - 4 + 2х + 7 = 5

2х + 2х = 5 + 6 + 4 - 7

4х = 8

х = 8/4

х = 2

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2 (2 - 3) - (4 - (2 * 2 + 7)) = 5

4 - 6 - (4 - 4 - 7) = 5

- 2 - 4 + 4 + 7 = 5

-6 + 11 = 5

5 = 5