Algebra (noun)

A branch of mathematics in which letters and symbols are used to represent numbers and quantities in equations and formulas.

Origin:

From arabic الجبر‎ (al-jabr, "the reunion of broken parts"), the title of a 9th-century book by the persian mathematician al-khwarizmi.

Examples:

1. Algebra is a branch of mathematics dealing with equations.
2. Algebra is used to solve mathematical problems.
3. Algebra is a subject that students learn in school.
4. Algebra is a tool for solving real-world problems.
5. Algebra is essential for understanding calculus.