Первый способ: (х-87)-27=36 x - 87 = 36 + 27 x - 87 = 63 x = 63 + 87 x = 150 Второй способ: (х-87)-27=36 x - 87 - 27 = 36 x - 114 = 36 x = 36 + 114 x = 150