Algebra. Learn to solve equations and systems of equations in various ways. Boost your brain! Grades 9-11

The proposed manual is dedicated to solving equations and systems of equations in various ways. A diverse material at the profile level is presented, which includes all the main methods and ideas for solving equations and systems studied in primary and secondary school: integer rational, fractional rational, irrational, trigonometric, logarithmic, and exponential. Numerous examples with detailed solutions and justifications show various methods for solving equations and systems of equations. At the beginning of each paragraph, brief theory and reference materials are provided, and at the end there is a large number of examples for independent solution with answers.