How to Move Window to Left or Right side of screen in winui 3?

i want to create a window in Left or Right side of a screen in winui 3

i used following codes:

var width = DisplayArea.Primary.WorkArea.Width;
var height = DisplayArea.Primary.WorkArea.Height;
var x = DisplayArea.Primary.WorkArea.X;
var y = DisplayArea.Primary.WorkArea.Y;

AppWindow.MoveAndResize(new Windows.Graphics.RectInt32
{
    Height = height,
    Width = 340,
    X = x,
    Y = y
});

i can see that my window is created in Left side of screen, but i dont know how to move my window to Right side of screen.

i tried to use:

X = x -340

but did not work if i use - window go to left side again and for going to right i should use + but i dont know how to calcualte currect value.