This textbook is intended for practical and theoretical classes in the discipline "System analysis and modeling," which are held in order to study and master students the theoretical foundations and practical skills of system analysis using a mathematical apparatus and quantitative system analysis of real economic processes and phenomena. The purpose of the textbook is to help students specializing in the economic field check the quality of mastering the lecture material. Systematic completion of tasks for independent work by students will provide a deeper understanding and memorization of the educational material.