# Ch 5: Linear Equations & Inequalities in Algebra: Help and Review

### About This Chapter

## Who's it for?

Anyone who needs help learning or mastering SAT mathematics level 2 material will benefit from taking this course. There is no faster or easier way to prepare for this SAT math subject test. Among those who would benefit are:

- Students who have fallen behind in understanding how to use linear equations and linear systems to solve problems
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning math (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about linear equations and inequalities for the SAT exam
- Students who struggle to understand their teachers
- Students who attend schools without extra math learning resources

## How it works:

- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Linear Equations & Inequalities in Algebra chapter exam.

## Why it works:

**Study Efficiently**: Skip what you know, review what you don't.**Retain What You Learn**: Engaging animations and real-life examples make topics easy to grasp.**Be Ready on Test Day**: Use the Linear Equations & Inequalities in Algebra chapter exam to be prepared.**Get Extra Support**: Ask our subject-matter experts any linear equations and inequalities question. They're here to help!**Study With Flexibility**: Watch videos on any web-ready device.

## Students will review:

This chapter helps students review the concepts in a linear equations and inequalities unit of a standard math course. Topics covered include:

- Writing linear equations
- Solving linear equations
- Using a system of equations
- Solving a system of equations
- Solving linear inequalities

### 1. What is a Linear Equation?

A linear equation is a pattern of numbers with proportional increase or decrease that is used to represent a line graph. Learn how to plot a graph and build and solve a linear equation.

### 2. How to Write a Linear Equation

Rather than drawing a graph from an equation, graphs can be used to determine equations using common algebraic techniques. Learn how to write a linear equation using two points and the slope formula as well as using background information on parallel and perpendicular lines.

### 3. Solving Linear Equations: Practice Problems

Linear equations are algebraic expressions of a line. Become familiar with recognizing and solving linear equations through examples and practice problems.

### 4. Solving Linear Equations with Literal Coefficients

In algebra, literal coefficients are letters or symbols that represent constants and allow us to solve certain linear equations. Learn what literal coefficients are, how they differ from variables, and how to solve literal equations with practice problems.

### 5. Problem-Solving using Linear Equations

Word problems can be solved after being translated into linear equations. Learn what a linear equation is and how to use it to solve simple problems, and take a look at some real-world practice problems.

### 6. What is a System of Equations?

Math word problems often ask students to compare and contrast, which are types of problems that can be solved with a system of equations. Learn about solving word problems using systems of equations and how to graph them, as well as the algebraic method of substitution through an example.

### 7. How Do I Use a System of Equations?

Most word problems that appear on math tests require a system of two or more equations to solve. Through examples, learn how to solve a system of equations with substitution and elimination in three steps.

### 8. Solving a System of Equations with Two Unknowns

When there are two unknowns presented in a mathematical problem, the system of equations model can be used to solve for both. Through practice, learn how to use the substitution and elimination practices to solve systems of equations for two unknown variables.

### 9. Solving Problems Involving Systems of Equations

Systems of equations are groups of two or more equations that have the same variables. Learn how to solve problems involving systems of equations through counting practice, money practice, and percent practice.

### 10. What is an Inequality?

An inequality is an equation that uses greater or less than symbols and is helpful in situations with multiple solutions. Explore inequalities, two-variable inequalities, and how to graph two-variable inequalities.

### 11. Solving Linear Inequalities: Practice Problems

In mathematics, linear equalities are expressions that compare two values using inequality symbols, such as the symbols for ''less than'' or ''greater than.'' Learn about linear inequalities and learn how to solve them by practicing both basic and advanced problems.

### Earning College Credit

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### Other Chapters

Other chapters within the SAT Mathematics Level 2: Help and Review course

- Basic Math Review: Help and Review
- Square Roots: Help and Review
- Basic Algebraic Expressions in Math: Help and Review
- Exponents in Math: Help and Review
- Absolute Value Equations & Inequalities: Help and Review
- Polynomials in Algebra: Help and Review
- Functions in Math: Help and Review
- Rational Expressions in Algebra: Help and Review
- Matrices: Help and Review
- Sequences and Series in Math: Help and Review
- Exponentials and Logarithms in Math: Help and Review
- Complex Numbers in Math: Help and Review
- Coordinate Geometry Basics: Help and Review
- Graphing Linear Equations & Inequalities: Help and Review
- Advanced Coordinate Geometry: Help and Review
- Three-Dimensional Geometry: Help and Review
- Overview of Trigonometry: Help and Review
- Probability, Combinations & Permutations: Help and Review
- Working with Data & Statistics: Help and Review
- Logic: Help and Review
- Limits in Math: Help and Review