Question

4z-12

Answer 1

What to do?

Answer 2

i need to solve for z

Answer 3

it cannot be solved since we don't know what it equals to.

Answer 4

4z-12=???

Answer 5

That means that this expression should equal 0 to solve for z then?
if so..
4z-12=0
Add 12 to both sides
4z-12=0
+12 +12
-----------
4z=12
Divide by 4 on both sides
4z=12
4z/4=12/4
z=3

??? Not sure if that's what the question means to be,
but @geerky42 is correct, this can not be solved it is an EXPRESSION. Not EQUATION.

Answer 6

is it supposed to be 4z=-12?