All you have to do is distribute and combine like terms here.
2. -4(9x - 2)
-36x + 8
4. 2x - 6(4x - 11)
2x - 24x + 66
-22x + 66
6. -9 + 2(-x - 16)
-9 - 2x - 32
-2x - 41
8. -5(1 - 6x) + 15
-5 + 30x + 15
30x + 10
10. 7 - 3/4(-8x + 20)
7 + 6x - 15
6x - 8
12. 10x - 3(7 - 2x) + 18
10x - 21 + 6x + 18
16x - 3
14. 15 - 2(4 + 7a) + 5a
15 - 8 - 14a + 5a
7 - 9a
16. -1 + 99a + 9(6 - 11a)
-1 + 99a + 54 - 99a
53
