Which of the following expressions could be simplified further?

8x + 3m + 7n + 4xz − 5p

6x − 7m + 9xz

4x + 3m − 5x + 8a

2x + 3m − 5xy + 4z

Question

Which of the following expressions could be simplified further? 

 8x + 3m + 7n + 4xz − 5p 

 6x − 7m + 9xz 

 4x + 3m − 5x + 8a 

 2x + 3m − 5xy + 4z

reemii · Answer

it can be simplified when there are several terms with the same variable.
and remember : x can't go with xy.

texaschic101 · Answer

The third one can be simplified further. 
4x + 3m - 5x + 8a = -x + 3m + 8a
This can be done because you have 2 x terms. The other expressions have no like terms.