Algebra.js – Build, display, and solve algebraic equations

In plain words

Algebra.js is a JavaScript library that allows developers to build, manipulate, and solve algebraic equations programmatically. It provides objects for working with fractions, expressions, and equations, handling operations like addition, subtraction, multiplication, and division. The library automatically reduces fractions and combines like terms when performing operations on expressions, making it useful for educational software, math applications, and computational tools.

written from the facts on this page · September 2026

From the sources

You can follow along with the examples right now by executing the suggested keyboard shortcut for your browser and operating system. This will open the JavaScript Console in your browser. The main objects available are Fraction, Expression, and Equation. Add, subtract, multiply, and divide fractions by either integers or other fractions. Fractions are automatically reduced. Add or subtract integers, fractions, variables, or other expressions to or from expressions. When adding / subtracting an expression to / from another expression, any like-terms will be combined. Keep in mind the distributive property when subtracting expressions. Multiply expressions by integers, fractions, variables,…from algebra.js.org

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