provides detailed solutions for the 7th-grade Algebra textbook by Mordkovich (Parts 1 & 2) , covering editions from 2009–2013.
You can access the solutions and explanations through these platforms: gdz po algebre avtoryf.g, mordkovich i t.d.7 klass onlain
and MegaResheba are also popular community-vetted sites that offer digital versions of the problem book (Zadachnik) for quick reference. gdz po algebre avtoryf.g, mordkovich i t.d.7 klass onlain