Given K and initial reactant concentrations, calculate concentrations at equilibrium

Please explain as much as you can:) And also, is this an ICE problem?

Yes It's an Ice problem
FOR EXAMPLE.
A....+.....2B--->.....C......+...D
1M.........1M..........0............0
-x............-2x........+x.........+x
1-x...........1-2x......x...........x
K=x^2/[(1-2x)^2*(1-x)]
you got K solve for x

Yes it is. But without any numbers, there's nothing much else to explain.