---
title: Linear Equations
description: Linear equations are algebraic equations of the first degree, representing straight lines when graphed. Learners will understand how to solve for unknown variables, calculate slopes, and graph equations to model real-world relationships with constant rates of change.
category: mathematics
subcategory: algebra
difficulty: beginner, intermediate, advanced
url: /subject/linear-equations
---

# Linear Equations

Linear equations are algebraic equations of the first degree, representing straight lines when graphed. Learners will understand how to solve for unknown variables, calculate slopes, and graph equations to model real-world relationships with constant rates of change.

## Available Resources

2 Books • 2 Courses • 2 Websites

## Courses

### 1. Linear Equations and Inequalities

Master linear equations and inequalities with this course from Sal Khan. Build a strong foundation in algebra!

**Difficulty:** Beginner | **Price:** Free

**Link:** https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:solve-equations-inequalities

**Tags:** linear-equations, inequalities, equation-solving, algebra

### 2. College Algebra

This College Algebra course will cover fundamental concepts of algebra required to interpret a variety of functions and equations.
This course is eligible for Audit and Verified Certificate only.

**Difficulty:** Beginner | **Language:** English | **Price:** Free

**Link:** https://www.edx.org/learn/algebra/doane-university-college-algebra

**Tags:** courses, mathematics-statistics, algebra

## Websites

### 1. Wolfram MathWorld

**Author:** Eric W. Weisstein

MathWorld is an online mathematics encyclopedia from Wolfram Research offering detailed, browsable articles on topics across the math spectrum, including algebra, geometry, calculus, and number theory. Each entry includes definitions, theorems, formulas, diagrams, worked examples, and links to further reading.

**Difficulty:** Intermediate | **Language:** English | **Price:** Free

**Link:** https://mathworld.wolfram.com

**Tags:** mathematics-reference, encyclopedia, abstract-algebra, number-theory, geometry

### 2. mathsisfun.com

MathIsFun.com is a beginner-friendly math site that explains concepts with clear, step-by-step lessons and interactive activities. It covers topics from algebra and linear equations to geometry, fractions, data, and more, with practice problems, worksheets, and quizzes.

**Difficulty:** Intermediate | **Language:** English | **Price:** Free

**Link:** https://mathsisfun.com

**Tags:** websites, mathematics-statistics, algebra

## Books

### 1. Intermediate Algebra

**Author:** Jay Lehmann

Pearson textbook that teaches intermediate algebra through curve fitting on real data sets, deriving linear, quadratic, exponential and logarithmic models from authentic situations. You practice reading a scenario, choosing a function family, and interpreting the resulting equation.

**Difficulty:** Intermediate | **Language:** English | **Price:** Paid

**Link:** https://www.amazon.com/dp/0321969359?tag=edmonddante07-20

**Tags:** books, mathematics-statistics, algebra

### 2. Algebra Essentials

**Author:** David A. Santos, Olgha B. Davis

Mercury Learning workbook covering arithmetic review, algebraic operations, linear equations and inequalities, factoring, exponents, radicals and quadratics. Built around worked examples and drill exercises with answer keys, it suits someone rebuilding algebra fundamentals before a placement test or precalculus course.

**Difficulty:** Intermediate | **Language:** English | **Price:** Paid

**Link:** https://www.amazon.com/dp/1937585220?tag=edmonddante07-20

**Tags:** books, mathematics-statistics, algebra

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