• Lesson 1 Cafeteria Actions and Reactions

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• Lesson 2 Elvira’s Equations

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• Lesson 3 Solving Equations Literally

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• Lesson 4 Greater Than?

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• Lesson 5 May I Have More, Please?

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• Lesson 6 Taking Sides

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• Lesson 7 Cafeteria Consumption and Cost

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• Lesson 8 Eating Up the Lunchroom Budget

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• Lesson 9 The Arithmetic of Matrices

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