Can you best explain the procedure

Equilibrium is established for the reaction 2X(s) Y(g) <--> 2Z(g) at 500K Kc= 100.Determine the concentration of Z in equilibrium with 0.2 mol X and 0.50 M Y at 500K.Can you best explain the procedure?Step one: Since 2X(s) is a solid its not included in the ice table.Step two: create the ice tableY(g)2Z(g)0.500 x-2×0.50 x-2x