What equation do you get when you solve z-m=z+bx for x?

X = -m/b.
Subtract z from both side and you get
-m= bx
Now divide both side by b and you get
-m/b= x

Z-m=z+bx
First, let's subtract z from each side:
z-m-z = z+bx-z
-m=bx
Then, to find x, you divide both sides by b to get the variable x alone on a side, and the others on another side:
-m/b = bx/b
-m/b = x

So, in z-m = z+bx, x = -m/b

Hope this Helps! :)

You divide them from both sides and you get -m/b=x