1) -х = 27 -х * (-1) = 27 * (-1) х = -27Проверка. -х = 27 -(-27) = 27 27 = 272) -х = 1,9 -х * (-1) = 1,9 * (-1) х = -1,9Проверка. -х = 1,9 -(-1,9) = 1,9 1,9 = 1,93) -х = -1 (8/15) -х * (-1) = (-1 (8/15)) * (-1) х = 1 (8/15)Проверка. -х = -1 (8/15) -(1 (8/15)) = -1 (8/15) -1 (8/15) = -1 (8/15)4) -х = 0,16 -х * (-1) = 0,16 * (-1) х = -0,16Проверка. -х = 0,16 -(-0,16) = 0,16 0,16 = 0,165) -х = m -х * (-1) = m * (-1) х = -mПроверка. -х = m -(-m) = m m = m6) -х = -n -х * (-1) = (-n) * (-1) х = nПроверка. -х = -n -(n) = -n -n = -n