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CBSE • Number Systems & Algebra

Pair of Linear Equations in Two Variables

Master substitution, elimination, and graphical methods for solving two linear equations.

Learning Objectives

  • Understand core concepts in Pair of Linear Equations in Two Variables
  • Apply step-by-step mathematical reasoning
  • Solve exam-style CBSE problems

Lesson Explanation

Lesson Content

A pair of linear equations ax + by + c = 0 can have a unique solution, infinitely many solutions, or no solution.

💡 Key Takeaway

Take one step at a time, check your working carefully, and keep both sides balanced!

Worked Examples

Example 1

Guided CBSE Example

  1. Step 1

    Identify the given values

  2. Step 2

    Apply the relevant formula

  3. Step 3

    Compute and check final units

Visual Method

Balance Every Step

Mathematics becomes much clearer when you can see the structure behind equations.

Watch Video Explanation

Practice Questions

Try solving each question on paper first. Tap below to check a helpful hint or solution!

Question 1

Solve Question 1 from NCERT exercises.

Show Hint / Solution 💡

Refer to the method demonstrated in Example 1.

Question 2

Solve Question 2 from NCERT exercises.

Show Hint / Solution 💡

Double check your signs and basic calculations.

Lesson Summary

What to Remember

Review key formulas, maintain logical steps, and verify your answers.

Download Lesson Notes ↓