The textbook is excellent for developing logical rigor. If you are using GDZ with it:
The textbook by A.G. Mordkovich and N.P. Nikolaev is a foundational component of the Russian mathematical curriculum, specifically designed for students in the advanced or "in-depth" (uglublyonny) study track. 📘 Textbook Overview algebra 7 klass a.g.mordkovich n.p.nikolaev gdz
Solve the problem first, then check the logic. The textbook is excellent for developing logical rigor