How to resolve variables in Perl -

i need resolving following variable ${$mapusers[$index]->[1]}

see below... prints find. when system($query_user) variable empty.

my $query_user = 'adquery user -w ${$mapusers[$index]->[1]}'; 

if want run adquery command , store output in $query_user, use backticks or qx:

my $query_user = `adquery user -w ${$mapusers[$index]->[1]}`;