1) 4x
2) 2x+3z=5z
=5z+5
3) I can't see problem number 3.
4) 9g+8g=17g
5) 5p-p=4p
=4p-8
6) Cant see problem number 6.
7) 4x-x= 3x 3y+2y
=3x+5y
8) 5x+4x= 9x 2y-y=y
=9x+y
9) Can't see problem number 9.
10) 7p+2p=9p 5z-2z=3z
=9p+3z
11) 7g+5h-12
12) Can't see problem number 12.
13) 3(r+2)-2r
3r+6-2r
=r+6
14) 5(2+x)+3x
10+5x+3x
=10+8x
15) Can't see problem number 15.
