Detailed solutions for these workbooks are hosted on several major Russian educational portals:
While Sh. A. Alimov is the primary textbook author, the workbooks are frequently developed by a team including Yu. M. Kolyagin, Yu. V. Sidorov, M. V. Tkacheva, and N. E. Fedorova . gdz po algebre klassa rabochaja tetrad koljagin sidorov
This specific set of materials is designed to accompany the popular Russian school textbook Algebra for grades 7, 8, and 9, written by Sh. A. Alimov and others. Detailed solutions for these workbooks are hosted on