Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true.

Lesson Videos:

#### Understand equations using a number line

In this lesson, you will learn that an equation has one solution by using a number line.

#### Understand equations using a bar model

In this lesson you will learn an equation has one solution by using a bar model.

#### Understand inequalities using a number line

In this lesson you will learn an inequality has multiple solutions by using a number line.

#### Understand inequalities using a bar model

In this lesson you will learn that an inequality has multiple solutions by using a bar model.

#### Distinguish between equalities and equations

In this lesson you will analyze the difference between an inequality and an equation.

#### Understand that equations have one solution using a pan balance

In this lesson you will learn an equation has one solution by using a pan balance.

#### Understand that an inequality has more than one solution using a pan …

In this lesson you will learn that an inequalities have more than one solution by using a pan balance.

#### Compare equations and inequalities using a Venn diagram

In this lesson you will learn to compare equations and inequalities by using a Venn diagram.

#### Isolation Drills:

Testing solutions of equations and inequalities

Testing solutions of equations and inequalities word problems

#### Interactive Practice:

- Solving Equations Using Inverse Operations – Explanation, examples and fifteen sample questions plus one standardized test practice question on this worksheet
- Algebraic Expressions – Explanation, examples, and several practice problems
- Algebraic Reasoning Using Weighing Scales – Learn how to think algebraically with these clever weighing scales. Levels 1 and 2 contain two scales. Level 3 is more difficult and has three scales. Your goal is to determine the weight of one or more of the objects.
- Balancing Equations – Spy Guys Interactive Lesson 11
- Beginning Algebra Tutorial 4: Introduction to Variable Expressions and Equations – Introduction, tutorial, lots of examples followed by practice problems
- Evaluate a Formula Using Substitution – Short video lesson
- Evaluate Expressions – Substitute values for variables in algebraic expressions and evaluate the expressions
- Evaluating an Expression with One Variable – Explanation, practice and a game
- Evaluating Expressions – Explanation, examples and a workout
- Evaluating Expressions with Two Variables – Explanation, practice and a game
- Evaluation: Evaluating Expressions, Polynomials, and Functions – Two-page lesson from Purple Math
- Expression Evaluation Calculator – Enter your expression and click on Evaluate.
- Expression Evaluation; Introduction to Expressions – First page of a multi page lesson with many examples and images
- How to Solve Linear Inequalities – From E How
- How to Solve Two Step Linear Equations in Algebra – Simple video lesson
- Inequalities and Their Graphs – Draw a graph for each inequality, answers on pages 3 and 4 of this worksheet
- Late Delivery – Find the value of expression written on each door to deliver the mail
- Learning ratios and proportions through scale drawings – A text lesson plan
- Linear Equations in One Variable – Tutorial with examples, several video clips are available to help student understanding
- Linear Inequalities – From Paul’s Online Math Notes
- Linear Inequalities – Graphing with a TI-83+/84+ calculator
- Math Word Problems – Eight question multiple choice quiz [Variation or Inverse Proportion]
- Patterns in Algebra – Find the relationship between two variables by using a table to find the pattern on this worksheet
- Practice problems in solving an equation with variables on both sides – Ten practice problems, answers are checked
- Single-Variable Inequalities – Solve one-step linear inequalities with this IXL quiz; addition and subtraction
- Solve Equations with Algebra – How to solve linear equations in one variable using algebra
- Solve One Step Linear Equations – Write your answer with w first, followed by an inequality symbol
- Solving an Equation – Practice at manipulating expressions and finding the value of variables
- Solving Linear Equations – Video lesson, solving linear equations with variable expressions in the denominators
- Solving Linear Inequalities – Tutorial with a large number of examples
- Solving One-Step Inequalities by Adding/Subtracting – Solve each inequality and graph its solution, answers on pages 3 and 4
- Solving One-Step Inequalities by Multiplying/Dividing – Solve each inequality and graph its solution, answers on pages 3 and 4
- Solving One-Step Linear Equations – Four page lesson from Purple Math, includes a Mathway widget to practice
- Solving One-Step Linear Inequalities – Examples with graphs followed by guided practice and a problem set; answers not included
- Solving Problems Involving Direct Proportion – Some good practice problems are presented here, UK units used [close the subscription screen to get to the problems]
- Solving Proportion Problems – Four examples with detailed explanation
- Taming Word Problems – An Internet4Classsrooms WebQuest related to this standard
- Teacher Dodgeball – Re-arrange the numbers and operational signs to form a correct equation in the time given. If you are correct, you will hit the teacher with the dodgeball and move on to a more challenging round. Defeat all five teachers and earn your dodgeball champion certificate.
- Translating Words Into Symbols – Translating words into symbols is equivalent to modeling a situation using an equation and variables
- Using Graphs, Equations, and Tables to Investigate the Elimination of Medicine from the Body: Modeling the Situation – Lesson plan from NCTM
- Using Inverse Operations to Solve Equations: When Students Ask – Suggestions for ways to answer student questions regarding this standard
- Using Letters as Variables in Algebra – Part of the Making Math Meaningful series
- Variables and Constants in Algebra – From School for Champions
- Verbal Reasoning – Challenges students to clearly understand a problem and think through the solution
- What Variable Would You Use …? – An answer from Wiki Answers
- Why Do We Use Variables in Algebra? – From Ask Dr. Math
- Writing Algebraic Equations – Explanation, examples, and five practice exercises to work
- Writing Equations – Sentences to translate into equations