Respuesta :

Kaikerscupcake
2x-2y+5z-2x-y+3z

2x-2x= 0 (cancel each other out0

-2y-y= -y (a variable always has a 1 in front of it, so just put a negative there) 

5z+3z= 8z

Combine those together.

8z-y 

I hope this helps!
~kaikers

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