nedd help with the delete function

[MaudDib]

You may say i`m a beginer . well I am but still i would like some help please . i want to delete a row from a php form . the unique value is determinate by 2 number ( let-s say $id and $nr ) . the value from $id and $nr are sent from a previous form . ( i`m using $_GET for their actual values ) .
$int = "delete from administr where id =".$id ;works just fine , but i need to delete that one row witch matches $id and $nr .How ?

[usedtire]

$int = "delete from administr where id =".$id." and nr =".$nr.

[MaudDib]

Thank you ,that realy helped .