Exhibit (a)(7) FOR IMMEDIATE RELEASE May 20, 2002 Contact: Eggert Dagbjartsson Equity Resources Group, Inc. 44 Brattle Street Cambridge, Massachusetts 02138 Telephone: (617) 876-4800 For Immediate Release Equity Resource Lexington Fund Limited Partnership announced today that it has extended its tender offer to purchase up to 9,130 units of limited partnership interests, or LP Units, in Winthrop Partners 80 Limited Partnership until June 3, 2002. The terms of the offer are otherwise identical to the terms of the original offer made to holders of LP Units on April 19, 2002. Approximately 497 units have been tendered as of the date of the extension.