# Ch 13: GRE Quantitative Reasoning - Equations and Expressions: Tutoring Solution

### About This Chapter

## How it works:

- Begin your GRE review.
- Identify the equations and expressions concepts that you're stuck on.
- Find fun videos on the topics you need to understand.
- Press play, watch and learn!
- Complete the quizzes to test your understanding.
- As needed, submit a question to one of our instructors for personalized support.

## Who's it for?

This chapter of our GRE prep tutoring solution will benefit any student who is trying to prepare for the GRE and earn acceptable scores. This resource can help students including those who:

- Struggle with understanding linear equations, polynomials or any other equations and expressions topic
- Have limited time for studying
- Want a cost effective way to supplement their GRE preparation
- Prefer learning GRE topics visually
- Find themselves struggling with their equations and expressions review
- Cope with ADD or ADHD
- Want to get ahead in preparing for the GRE
- Need access to GRE prep materials

## Why it works:

**Engaging Tutors:**We make preparing for the GRE simple and fun.**Cost Efficient:**For less than 20% of the cost of a private tutor, you'll have unlimited access 24/7.**Consistent High Quality:**Unlike a live GRE prep tutor, these video lessons are thoroughly reviewed.**Convenient:**Imagine a tutor as portable as your laptop, tablet or smartphone. Review equations and expressions on the go!**Learn at Your Pace:**You can pause and rewatch lessons as often as you'd like, until you master the material.

## Learning objectives:

- Review how to write and graph a linear equation.
- Learn to solve systems of equations, and see examples of them in real life.
- Find out how to convert word problems into systems of equations.
- Get tips on adding, subtracting and multiplying polynomials.
- Learn to solve absolute value equations and evaluate absolute value expressions.

### 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. 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.

### 4. 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.

### 5. How to Add, Subtract and Multiply Polynomials

Polynomials can be added, subtracted, and multiplied similarly to regular numbers once the variables have been organized. Learn the steps required to apply the principles of addition, subtraction, and multiplication to polynomials through a series of example problems.

### 6. Solving Absolute Value Practice Problems

The solution to an absolute value problem will always include two answers that are arrived at by splitting the equation up. Learn how to solve for absolute value with a step-by-step introduction using an onion analogy.

### 7. How to Solve an Absolute Value Equation

An absolute value equation includes a variable that is an absolute value as one of the variables resulting in two solutions, the positive or negative. Learn about the methods of solving basic absolute value equations and why it is necessary to split an absolute value equation into two possible equations to solve for the variable.

### 8. How to Evaluate Absolute Value Expressions

An absolute value expression can be evaluated, but all operations contained within the absolute value bars must be completed before making it positive. Learn how to solve an absolute value expression by substituting individual variables and replacing groups of variables.

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### Other Chapters

Other chapters within the GRE Prep: Tutoring Solution course

- GRE Verbal Reasoning - Reading Skills: Tutoring Solution
- GRE Verbal Reasoning - Vocabulary Skills: Tutoring Solution
- GRE Analytical Writing - Crafting Your Argument: Tutoring Solution
- GRE Analytical Writing - Planning Your Essay: Tutoring Solution
- GRE Analytical Writing - Starting Your Essay: Tutoring Solution
- GRE Analytical Writing - Writing the Essay Body: Tutoring Solution
- GRE Analytical Writing - Editing Your Essay: Tutoring Solution
- GRE Analytical Writing - Writing Technique: Tutoring Solution
- GRE Analytical Writing - Writing Stronger Sentences: Tutoring Solution
- GRE Analytical Writing - Grammar and Usage: Tutoring Solution
- GRE Quantitative Reasoning - Numbers and Operations: Tutoring Solution
- GRE Quantitative Reasoning - Sequences and Series: Tutoring Solution
- GRE Quantitative Reasoning - Factoring with FOIL, Graphing Parabolas and Solving Quadratics: Tutoring Solution
- GRE Quantitative Reasoning - Exponents: Tutoring Solution
- GRE Quantitative Reasoning - Functions: Tutoring Solution
- GRE Quantitative Reasoning - Rational Equations and Expressions: Tutoring Solution
- GRE Quantitative Reasoning - Inequalities: Tutoring Solution
- GRE Quantitative Reasoning - Plane Geometry: Tutoring Solution
- GRE Quantitative Reasoning - Coordinate Geometry: Tutoring Solution
- GRE Quantitative Reasoning - Probability and Statistics: Tutoring Solution
- GRE Quantitative Reasoning - Sets: Tutoring Solution
- GRE Prep Flashcards