Two Washington men pleaded guilty yesterday to second-degree murder in the beating death of the owner of a Capitol Hill delicatessen.

William A. Jackson, 18, of 1151 New Jersey Ave. NW, and Spencer A. Wade, 19, of 2911 13th St., NW, also pleaede guilty to attempted robbery in connection with the slaying of Charles Solomon, the 63-year-old owner of the Delly of Capitol Hill at 332 Pennsylvania Ave. SE.

Jackson had been employed as a busboy at the restaurant for two weeks before the slaying.

D.C. Superior Court Judge Robert Scott asked the defendants whether both had been involved in beating Solomon. Jackson and Wade both responded affirmatively.

The husky, white-haired Solomon, a well-known figure in the Capitol Hill neighborhood, was clubbed to death in his restaurant on May 29.

Jackson has a juvenile record and has spent time at Oak Hill, the city-run juvenile detention center in Laurel. A family member said Jackson lived in foster homes when he was a child and that his mother, described by the relative as an alcoholic, had died last year. His three brothers are in prison, the family member said.

Jackson and Wade also pleaded guilty yesterday to burglarizing a home on 56th Street in Northeast two weeks before the Solomon killing.