2x - (5 - 4x) = 2x - 5 + 4x = 6x - 5
3a - (a + 2) = 3a - a - 1 = 2a - 2 = 2(a - 1)
-2в + (-в) = -2в - в = -3в
2x - (5 - 4x) = 2x - 5 + 4x = 6x - 5
3a - (a + 2) = 3a - a - 1 = 2a - 2 = 2(a - 1)
-2в + (-в) = -2в - в = -3в