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### Course: 6th grade (Illustrative Mathematics) > Unit 6

Lesson 7: Lesson 6: Write expressions where letters stand for numbers- Model with one-step equations
- What is a variable?
- Evaluating an expression with one variable
- Evaluating expressions with one variable
- Writing basic expressions word problems
- Writing basic expressions word problems
- Writing basic expressions word problems

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# Model with one-step equations

## Problem

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