19-2d=-20-17d-6 - Solve ar equation with one unknown -

19 2dBrowse, Publish, About, Search advanced search, Submission Instructions, Submit your Manuscript, PLOS Journals, PLOS BlogsA defendant must serve an answer: (i) within 21 days after being served with the summons and complaint; or (ii) if it has timely waived service under Rule 4(d)