I tried to make a macro to do this, but I failed.

I need to do this: in the same row I want to copy the contents of one cell
and then copy the same contents into the next cell to the right, and then
delete the contents in the left cell.

I have tried various keystrokes, but it doesn't seem to work. Is there any
way this can be automated? Of course using a macro would be nice, but as I
said I couldn't get it to do even this simple task. Could someone please give
me some advice? Also, I am incapable of writing a macro from scratch.

To repeat: copy the contents of a cell, paste the contents in the next cell
(to the right), and delete the contents of the first / left cell.