The full problem book (Zadachnik) by Mordkovich and Semenov (2019 edition) is indexed on Skysmart .
You can find step-by-step solutions for both parts of the curriculum (2009-2013 editions) on Skysmart or browse the full collection of manuals on GDZ.ru . gdz po algebre klass a, g.mordkovich izdatelstvo mnemozina
Since your request is slightly broad, I've organized the most likely resources by grade level. Please clarify which or specific part (Part 1: Textbook or Part 2: Problem Book) you need so I can provide the exact steps or page numbers. Popular Resources by Grade The full problem book (Zadachnik) by Mordkovich and