Please! Help with pre algebra homework!

PLEASE please please show work!

24. 9b+6-3b-3-b

26. 7a+8-3a

28. 2z+5z+b-7

30. ax-8y+2x-8-4y

32. 7d-d+3e+12

thank u soooo much! :)

24. 9b+6-3b-b
5b+6 (because you subtract 9b-3b-b and all that's left is 6)

26. 7a+8-3a
4a + 8

28. 2z+5z+b-7
7z+b-7

30. I'm not sure on this one. I think this is how you would solve it.
ax-8y+2x-8-4y
3ax-4y-8

32. 7d-d+3e+12
6d+3e+12

um, don't you just add the "like terms"?

example:


24. 9b+6-3b-3-b (subtract "-3b" from "9b" to get 6b, then subtract "-b" from "6b" to get "5b")
5b+6-3






26. 7a+8-3a
4a+8


I'm not sure if I'm right, but I tried. (~: