Bash argument expanded inside alias

[rcb <rcb@beco.cc>]

Dear Debian users,

Anyone knows why this command:

:~$ alias muda='find . -name "*" -mtime -$1'

and all this variations I tried:

:~$ alias muda='find . -name "*" -mmin -`echo $1`'

:~$ alias muda='find . -name "*" -mmin `echo -$1`'

:~$ alias muda='find . -name "*" -mmin $(echo -$1)'

:~$ alias muda='find . -name "*" -mmin -$@'

:~$ alias muda='find . -name "*" -mmin -`echo "$1"`'

:~$ alias muda='find . -name "*" -mmin `echo "-$1"`'

:~$ alias muda='find . -name "*" -mmin $(echo "-$1")'

does not work to do what your intuition imagine what I want it to do?

Thanks, non-computer minds, for any help.

Beco.