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# Unit 1: Algebra foundations

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## About this unit

Why did humans invent algebra in the first place? Let's look at the history and beauty of algebra, and review some fundamental ideas and tools we'll use throughout the course.### Learn

### Practice

- Evaluating expressions with one variableGet 5 of 7 questions to level up!

### Learn

### Practice

- Evaluating expressions with multiple variablesGet 3 of 4 questions to level up!
- Evaluating expressions with multiple variables: fractions & decimalsGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

### Learn

### Practice

- Combining like terms with negative coefficientsGet 5 of 7 questions to level up!
- Combining like terms with negative coefficients & distributionGet 3 of 4 questions to level up!
- Combining like terms with rational coefficientsGet 3 of 4 questions to level up!

### Practice

- Equivalent expressionsGet 5 of 7 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

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Level up on all the skills in this unit and collect up to 700 Mastery points!