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#### Why You Need Algebra

#### What Is Algebra?

#### How to Add and Subtract Variables

#### How to Multiply Numbers with Variables

#### Examples of Multiplying Numbers with Variables

#### What Are Variable Terms?

#### How to Expand Parentheses with Variables

#### How Do You Multiply Parentheses?

#### What Are the Parentheses Rules?

#### What Are the Power Rules for Variables?

#### How to Divide Powers

#### How to Multiply Powers in Parentheses

#### Examples of Solving Powers with Variables

#### What Is the Connection Between Powers and Roots?

#### How to Simplify Fractions with Variables

#### How to Multiply Fractions with Variables

#### How to Divide Fractions by Canceling

#### How to Add and Subtract Fractions with x in the Denominator

#### How to Factor Variable Expressions

#### How to Factorize and Simplify Fractions with Variables

#### How to Factorize Polynomials of Degree 3 and 4

#### How are Rational Expressions Simplified?

#### The First Algebraic Identity of Quadratic Expressions

#### The Second Algebraic Identity of Quadratic Expressions

#### The Third Algebraic Identity of Quadratic Expressions

#### What Is the Formula for Completing the Square?

#### Why You Need Equations

#### What Is an Equation?

#### What Is a Variable?

#### How to Solve Equations (Change Sides, change sign)

#### How to Get Rid of the Number in Front of x

#### How to Solve Linear Equations (Combined Methods)

#### How to Get Rid of the Number Under x

#### How to Solve Equations with Parentheses

#### How to Solve Formulas for Specified Variables

#### How to Solve Quadratic Equations Without a Linear Term

#### How to Solve Quadratic Equations

#### How to Factorize Quadratic Expressions

#### What Is Polynomial Long Division?

#### How to Solve Cubic and Quartic Equations

#### What Are Systems of Equations?

#### Graphic Representation of Equations

#### How to Graphically Solve Systems of Equations

#### Solve Systems of Equations with the Substitution Method

#### Solve Systems of Equations with the Elimination Method

#### How to Solve Systems of Nonlinear Equations

#### Solve Systems of Equations with Multiple Unknowns

#### How to Solve Equations with Fractions

#### Solve Rational Equations with x in the Denominator

#### What Are Radical Equations?

#### What Are Power Equations?

#### How to Check Solutions to an Equation

#### How to Formulate an Equation Representing a Problem

#### What Is the Zero Product Property?

#### How to Solve Equations Using Substitution

#### How to Solve Equations by Graphing

#### How to Solve a Linear Inequality

#### How to Solve Inequalities Graphically

#### How Do Sign Charts Work?

#### How to Find the Interval of an Inequality

#### What Are Quadratic Inequalities?

#### How to Solve Inequalities of Degree 3 or More

#### What Are Rational Inequalities?

#### What Is a Logarithm?

#### What Is Euler's Number e?

#### What Is the Natural Logarithm?

#### What Are the Logarithm Rules?

#### What Are Exponential Equations?

#### What Are Logarithmic Equations?

#### How to Solve Exponential Inequalities

#### How to Solve Logarithmic Inequalities