Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Linear Equations in Disguise!

January 29, 2016

Students rewrite and solve equations that are not obviously linear equations using properties of equality

Warm-Up: Solve each equation.

-5(x + 2) = 3x + 6 2x + 3x = 2x - 12

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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-5(x + 2) = 3x + 6

Warm-Up

2x + 3x = 2x - 12

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Homework Questions.

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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x5

612

=

Concept Development.

What do we call this kind of problem?

How do we solve it?

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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x5

612

=

Concept Development.

A proportion is really a linear equation in disguise!

5 * 6 = 12 * x30 = 12x

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Parenthesis...

We can add them without changing what the expression/equation is saying...

5 * 6 = 12 * x

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Open to page S.27

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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• Turn to page S.28.

• Skip example 3.

• Start on Exercise 1.

• Check work/solution with other students at your group.

• Can use the proportion cards if it helps :)

Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Module 4 ­ Lesson 8 ­ Linear Equations in Disguise

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Homework.Lesson 8.Problem SetPage S.30.