Wikipedia
Elementary algebra encompasses some of the basic concepts of algebra, one of the main branches of mathematics. It is typically taught to secondary school students and builds on their understanding of arithmetic. Whereas arithmetic deals with specified numbers, algebra introduces quantities without fixed values, known as variables. This use of variables entails a use of algebraic notation and an understanding of the general rules of the operators introduced in arithmetic. Unlike abstract algebra, elementary algebra is not concerned with algebraic structures outside the realm of real and complex numbers.
The use of variables to denote quantities allows general relationships between quantities to be formally and concisely expressed, and thus enables solving a broader scope of problems. Most quantitative results in science and mathematics are expressed as algebraic equations.
Usage examples of "elementary algebra".
They went through addition, subtraction, multiplication and division in short order and before he knew it he was into elementary algebra.
When, in elementary algebra, you do problems about A, B and C going up a mountain, you have no emotional interest in the gentlemen concerned, and you do your best to work out the solution with impersonal correctness.