CC Math 7: Chapter 3

Expressions & Equations

Video Tutorials

Algebraic Expressions: Intro to Polynomials and Terms

Algebraic Expressions (Lesson 3.1)

Terms and Collecting Like Terms

Simplify an Expression by Combining "Like" Terms

Combining "Like" Terms

Adding and Subtracting Linear Expressions (Lesson 3.2)

The Distributive Property and Factoring Expressions

Factoring Expressions

Factoring Algebraic Expressions

Solving One-Step Addition & Subtraction Equations

Solving One-Step Equations Using Addition or Subtraction

Solving One-Step Equations Using Multiplication & Division

Solving 2-Step Equations

Solving 2-Step Equations: Part 1

Solving 2-Step Equations: Part 2

Solving Muti-Step Equations

Additional Resources

EXPRESSIONS & EQUATIONS

An EXPRESSION is a mathematical statement that involves numbers, variables, or a combination of numbers and variables and operation symbols. It does NOT have an equal sign or an inequality symbol.

An EQUATION is made up of two expressions joined by an equal sign.

"SIMPLIFY" BEFORE YOU "SOLVE"

STEP 1: Use the Order of Operations to simplify the expressions on each side.

STEP 2: Use the REVERSE Order of Operations to solve the equation.

Start by combining all "like" terms from both sides through addition and subtraction.
Put all terms containing variables on one side and all constant terms on the other.
Once there are no more "like" terms left anywhere in the equation, then you can use multiplication and division to remove the coefficient of the variable.

Common Core State Standards (CCSS)

3.1 Algebraic Expressions (CCSS 7.EE.1, 7.EE.2)

3.2 Adding and Subtracting Linear Expressions (CCSS 7.EE.1, 7.EE.2)

3.3 Solving Equations Using Addition or Subtraction (CCSS 7.EE.4a)

3.4 Solving Equations Using Mutiplication or Division (CCSS 7.EE.4a)

3.5 Solving Two-Step Equations (CCSS 7.EE.4a)

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