Algebra course. Grades 7-9. For independent study and preparation for the Unified State Exam

This book is addressed to people who want to independently master the course of algebra of the 7-9 grades of a comprehensive school in order to either pass or retake OGE, or help someone to do this, or simply out of a desire to systematize the existing knowledge in this important part of our education.
The book gives a complete system of concepts of this course. Each mathematical sentence is not designed as a vague "rule", but in the form of a definition or theorem. These proposals are accompanied by tasks developed in accordance with the modern requirements of domestic pedagogy. Definitions are accompanied by assignments for recognition and assignments for bringing to the concept, and theorem - tasks for identifying applicability and using these theorems.
The book contains a system of self -control. These are tests available at the end of each chapter along with answers to tasks. We advise the reader who is familiar with the course of some chapters to begin their study with an attempt to perform a test for her. In case of success, reading this chapter can be omitted