а) 5a - 3b - 8a + 12b = -3a + 9bб) 16c + (3c - 2) - (5c + 7) = 16c + 3c - 2 - 5c - 7 = 14c - 9в) 7 - 3(6y - 4) = 7 - 18y + 12 = -18y + 19
а) 5a - 3b - 8a + 12b = -3a + 9b
б) 16c + (3c - 2) - (5c + 7) = 16c + 3c - 2 - 5c - 7 = 14c - 9
в) 7 - 3(6y - 4) = 7 - 18y + 12 = -18y + 19