Question

Simplify the following expression:

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

Answer 1

A:x - 3y + 8z

B:2x - 2y + 8z

C:3y + 8z

D:-3y + 8z

Answer 2

-3y + 8z

Answer 3

D

Answer 4

You simplify by combining the "like terms."
You combine all the terms with x together.
Then you combine all the terms with y together.
Then you combine all the terms with z together.

2x - 2y + 5z - 2x - y + 3z
1) Combine like terms

You can make this easier to do if you shuffle the terms around a little so that the "like" ones are next to each other.
2x - 2y + 5z - 2x - y + 3z
Same as
2x - 2x - 2y - y + 5z + 3z

Now you combine 2x with - 2x
Then you combine - 2y with - y
Then you combine 5z with 3z

2) After you have combined all the like terms, you end up with this:
- 3y + 8z <-- answer

Answer:
- 3y + 8z