While there is no official "solutions manual" sold separately for students, there is a widely used unofficial resource that is considered the "better" option by most students. Mame 251 Full Rom Set — Samples. It Was
The standard reference for Pinter solutions is a PDF document created by a former student (often cited as being by Robert Milnikel, though metadata varies). It is typically found on university websites or repositories. Filmi 4 Back Xyz [DIRECT]
It seems you are looking for a resource that provides solutions to Charles C. Pinter's A Book of Abstract Algebra .