1) 16a - 7(a + 5) = 16a - 7a - 35 = 9a - 35
2) 14a - 3(8 - a) = 14a - 24 + 3a = 17a - 24
3) 6x + (2.4 - x) - (1.4 - 5x) = 6x + 2.4 - x - 1.4 + 5x = 10x + 1