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Solve Both Sides Day 1Teacher Notes

Supplies Each student needs a bag of algebra tiles.

Revised 8/11/11

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Target 3b I can show the algebraic steps I used to

find a solution to a multi-step equation.

Make up an equation with variables on both sides of the equation.

Make up an equation with variables on both sides of the equation.

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Get a piece of blank paper

• Fold it in half hamburger style.• Use the fold to divide the 2 sides of

the equation.

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LaunchLaunch• Use algebra tiles to solve 2x – 3 = 5

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Use Algebra Tiles to Solve

Linda asks Heather and Cindy how many books they read over summer. Cindy read 4 times as many books as Linda read. Heather read 4 more than three times as many books as Linda read. How many books did Cindy read?

What are you asked to find?Define x: Write an equation to solve the problem.

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Make the equation with tiles3x + 4 = 4x

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Make this equation with tiles

3x + 4 = 4x

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Solve: 3x + 4 = 4x

=

4 = x

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✔Check it: 4 = x 3x + 4 = 4x

16 16=

✔ :-)

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Use Algebra Tiles to Solve

Linda asks Heather and Cindy how many books they read over summer. Cindy read 4 times as many books as Linda read. Heather read 4 more than three times as many books as Linda read. How many books did Cindy read?

Now that you know what x is, what were you asked to find?

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Solve: 2x + 4 = 5x + (-5)

Solve this one with your partner!

Solve this one with your partner!

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

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Solve: 2x + 4 = 5x + (-5)

x = 3

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✔Check it: x = 3 2x + 4 = 5x + (-5)

10 10=✔ :-)

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Team PracticeTeam Practice

Solve3x + 1 = 4x – 3

2(x – 4) = 6

Check your answers.Be prepared to share your work.

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Debrief

Explain How do you solve equations with variables on both sides?

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5

3

12

4

Did you hit the target? Target 3b I can show the

algebraic steps I used to find a solution to a multi-step equation

Rate your understanding of the target from 1 to 5.

5 is a bullseye!

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PracticePractice

Practice 2.6 ___

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Ticket Out

If you were told to solve, what would you do next?