Решите пожалуйста 5x + 8 + (3x - 3) = (5 + 9x) – 4
5x + 8 + 3x - 3 = 5 + 9x - 4 8x + 8 - 3 = 9x + 5 - 4 8x + 5 = 9x + 1 8x - 9x = - 5 + 1 - x = - 4 x = 4