Answers

2016-07-12T21:04:35+08:00
   4-16+4+8
= -12  + 12
= 0

is that what you mean?

0
No. The first step is you're going to combine the same terms. That's what my classmates told me
ahhh...maybe this one....
X-16+x+8 x+−16+x+8
=(x+x)+(−16+8)
=2x+−8
X-16+x+8
=(x+x)+(−16+8)
=2x+−8 ...........???