Equilibrium concentration at 1000K?

For the following reaction, Kc = 255 at 1000K.

CO (g) + Cl2 (g) <--> COCl2 (g)

A reaction mixture initially contains a CO concentration of 0.1550 M and a Cl2 concentration of 0.170 M at 1000K.

What is the equilibrium concentration of CO at 1000K?

What is the equilibrium concentration of Cl2 at 1000K?

What is the equilibrium concentration of COCl2 at 1000K?

I got it set up in the ICE table like this:

CO + Cl2 <--> COCl2

I 0.1150 0.170 0

C -x -x +x

E 0.1150-x 0.170-x x

And I have the formula as:

255 = x / ((0.1150-x)(0.170-x))

But this is where I run into problems. For some reason, no matter what I do, I always get the wrong answer. Can someone figure this through step-by-step please?