а) 5x + 3y - x - 10y = 4x - 7y
b) 2a - (6 - a) + (9a - 3) = 2a - 6 + a + 9a - 3 = 12a - 9
в) 5 - 3(6c - 2) = 5 - 18c + 6 = 11 - 18c
а) 5x + 3y - x - 10y = 4x - 7y
b) 2a - (6 - a) + (9a - 3) = 2a - 6 + a + 9a - 3 = 12a - 9
в) 5 - 3(6c - 2) = 5 - 18c + 6 = 11 - 18c