Question

6z-8-z+3=0?
frist step is to combine the like tearms? so i would combime the z, but what about the negitive sign?

Answer 1

We define subtraction as:
\[
a-b=a+(-b)
\]So, try using that.

Answer 2

so the z would be like -1z?

Answer 3

Yep, so now we can move it around in the equation, to see:
\[
6z-8-z+3=6z-8+(-z)+3=\\6z+(-z)-8+3=6z-z-8+3=5z-8+3=0
\]Et al.