How would you do this equation?

[chrisname]

So I have some maths homework and the way I'm meant to input my answer seems a little weird. The question is as follows;

Make x the subject of
8x + v = 4x + w

This is how I did it, the operations I did are in square brackets:

8x + v = 4x + w [/4]
2x + v = x + w  [-x]
x + v = w       [-v]
x = w - v

But the input box thing is in the format

x = ____a____         
        b

Am I missing something here? Rearranging equations I usually find easy...
I guess I could put w - v over 1...

[firedraco]

You didn't actually divide both sides by 4, you just divided both Xs by 4.

[chrisname]

Oh I see. So I did it completely wrong.

Well now I can do the rest; thanks.