1) 4x+16x
2) 20x+3y-y
3) 20x+2y+9-(-22)
4) 20x+2y+31
I'm not absolutely certain, because I'm just learning about this in school, but I'm pretty sure that's right.
For the second one...
1) -z+z-4y+5+2
2) 0-4y+5+2
3) 0-4y+7
Again, not certain, so you may wanna look at the other answers first, but that's my best answer, so I hope this helps! :)
