Your book seems to have big issues. In your other question I pointed out an issue. Here also, looking at your attachment, an issue becomes clear.
For the equilibrium AgCl (s) = Ag+ (aq) + Cl- (aq) Keq = Ksp = [Ag+]eq [Cl-]eq. [AgCl] will not appear in the denominator, since the molarity of a solid is a constant at a given temperature, similar to its density. Therefore, Keq = x2, not what the book shows after the ice table.
Incidentally, in the ice table they are not moles (like initial moles), but molarities (like initial molarity).