If you need to purchase a new copy of the workbook itself, they are available from several merchants:
For students abroad, this workbook is available at Lulu Press for $12.89 . If you need to purchase a new copy
The most widely used workbooks in Russian schools follow the textbooks by and L.M. Rybchenkova . If you need to purchase a new copy
GDZ platforms like GDZ.ru and Resh.skysmart.ru provide complete answer keys for both Part 1 and Part 2. If you need to purchase a new copy
Provides detailed explanations for the Ladyzhenskaya curriculum. Buying Physical Workbooks
Solutions are available on major educational portals, covering editions from 2011 to 2019. Where to Find Solutions Online