Help! I think I am right, but not sure.

Factor out greatest common factor then simplify the factors
15wx-20wy-25wz=
5w(3x)+5w(-4y)+5w(-5z)=
5w(3w-4y-5z)=
5w

2 answers

Where did the x go?

Other than what I assume is a typo, everything looks good.
Sorry, I should have put

5w(3x-4y-5z)=5w