Solve a system of equations using substitution: word problems

Master the skills and concepts for: Solve a system of equations using substitution: word problems.

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Lesson 83 of 192
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Concept

What you'll learn

This lesson covers Solve a system of equations using substitution: word problems. Understanding this topic builds your mathematical foundation and connects to other ideas in the course.

Key ideas

Work through the definitions, examples, and procedures. Pay attention to when and how to apply the main concept. Practice with the exercise below to reinforce your understanding.

Why it matters

These skills appear in later lessons and in real-world applications. Take time to check your work and use the quiz to confirm you've got the main idea.

Try it

Practice: Solve a system of equations using substitution: word problems.

1. Work through one example from the concept section. 2. Try a similar problem with different numbers or a slight variation. 3. Explain in one sentence how you knew what to do.

๐Ÿ“ˆ Coordinate Grapher

Explore the graph and connect it to the lesson idea.

y = y = 1x
-10-9-8-7-6-5-4-3-2-112345678910-10-9-8-7-6-5-4-3-2-112345678910

Concept Check

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Practice tip
Work one example fully before moving on. Check each step against the concept section.

Key terms