It is highly likely that there is a slight mix-up with the name.
Regardless of the author, a 7th-grade physics reshebnik will cover these core units: reshebnik po fizike 7 klass m v iakobi
: The most standard textbook used in Russian schools. Reshebniks for Peryshkin are available on educational sites like Gdz.ru or MegaResheba. It is highly likely that there is a
1. The Confusion with B. S. Jacobi (Boris Semenovich Jacobi) Jacobi (Boris Semenovich Jacobi) Searching for a "reshebnik"
Searching for a "reshebnik" (solution book) specifically authored by (М. В. Якоби) for 7th-grade physics reveals that such a person is not a standard, widely recognized author of a secondary school textbook in Russia or neighboring countries.
: While he is studied in the 7th-grade curriculum (especially regarding electromagnetism and the first electric motor), he did not write a 7th-grade textbook or solution book himself.