That was english, but I'll make it clearer...

Either:
//echo -a A           A
//echo -a A $chr(160) $chr(160) $chr(160) $chr(160) $chr(160) A
or
//echo -a A $str($chr(160),9) A

Edit:
The first one doesn't work since the forum decided to convert them from nbs to normal spaces.

Edit 2:
//var %temp Hello | echo -a A: %temp $+ $str($chr(160),$calc(10 - $len(%temp))) B: Bye

Change "Hello" to something else (less than 10 characters long) and spaces will be added/removed depending on the length of what you typed to keep B: Bye in the same place.