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# Unit 4: Systems of equations

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## About this unit

If one line is useful, let's see what we can do with two lines. In this unit, we learn how to write systems of equations, solve those systems, and interpret what those solutions mean in a real-world context.

### Learn

### Practice

- Systems of equations with graphingGet 3 of 4 questions to level up!

### Learn

### Practice

- Systems of equations with substitutionGet 3 of 4 questions to level up!

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

### Learn

### Practice

- Number of solutions to a system of equations graphicallyGet 3 of 4 questions to level up!
- Number of solutions to a system of equations algebraicallyGet 3 of 4 questions to level up!

### Learn

### Practice

- Age word problemsGet 3 of 4 questions to level up!
- Systems of equations word problemsGet 3 of 4 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!