Решим каждое уравнение, чтобы найти значение x:
9 + x = 9x = 9 - 9 = 0.x : 12 = 0x = 0 * 12 = 0.x - 0 = 15x = 15.9 * x = 9x = 9 / 9 = 1.19 * x = 0x = 0 / 19 = 0.x + 17 = 17x = 17 - 17 = 0.Ответ: x = 0, x = 0, x = 15, x = 1, x = 0, x = 0