The book you are looking for, by V.V. Babaitseva and L.D. Chesnokova, is a theoretical textbook. Because it contains rules and theory rather than exercises, there is no "GDZ" (Ready-Made Homework) for this specific volume.
... и Л. Д. Чесноковой «Русский язык. Теория. 5-9 классы» (для общеобразовательных учреждений). Б12. Бабайцева, В.В. Русский язык. КГТУ им. И. Раззакова skachat gdz po russkomu klass v.v.babajceva, l.d chesnokova
To find answers for your homework, you need the GDZ for the (Praktika) books, which are separate for each grade (5th, 6th, 7th, 8th, and 9th). Where to Find the Materials The book you are looking for, by V
Русский язык Теория 5-9 класс Бабайцева The book you are looking for