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GDZ (solutions) for Ershova, Goloborodko, and Ershova's "Independent and Control Works" in math, algebra, and geometry are available through online platforms or digital scans for grades 5–11, featuring multiple difficulty levels. The materials, which include independent, home, and control tasks, are widely used in schools.
You can find the full text of the workbooks in PDF format at ege-ok.ru and teacher-math.ru .
А.П. Ершова, В.В. Голобородько, - АЛГЕБРА ГЕОМЕТРИЯ