Lesson 3-5 Pages 120-124 Solving Two-Step Equations Lesson Check 3-4.

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Presentation transcript:

Lesson 3-5 Pages Solving Two-Step Equations Lesson Check 3-4

What you will learn! How to solve two-step equations.

Two-step equation

What you really need to know! A two-step equation contains two operations. To solve, use inverse operations to “undo” each operation in reverse order. First “undo” addition / subtraction. Then “undo” multiplication / division.

3x +0 = 21 3x = 21 Example 1: Solve 3x – 4 = x = 7

Example 2: Solve

Example 3: The formula F = 1.8C + 32 can be used to convert Fahrenheit degrees to Celsius degrees. Solve the equation to find the equivalent Celsius temperature for 59°F.

Example 3: 59 = 1.8C = 1.8C = C 15°C

Example 4: x 5 - =7 -2 = x

Example 5: b – 3b + 8 = 18 -2b + 8 = 18 -2b = 10 b = -5

Page 122 Guided Practice #’s 3-12

Pages with someone at home and study examples! Read:

Homework: Pages #’s even #’s Lesson Check 3-5

Page 729 Lesson 3-5

Lesson Check 3-5