Respuesta :

rpadilla0039

Answer:

1)18x

2)4x-3y+9z

i hope this helps

use math -

way to do the ones you dont know

Step-by-step explanation:

olasunkanmi74

Answer:

  1. 18x
  2. 4x - 3y + 9z

Step-by-step explanation:

1) 7x + 11x = 18x

2) 3x - 2y + 4z - 2x - 3y + 5z + 6x + 2y - 3x

= 3x - 2x + 6x - 3x - 2y - 3y + 2y + 4z + 5z

= 4x - 3y + 9z