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CBSE Guide Linear Equations in Two Variables class 9 Notes

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9 Mathematics notes Chapter 4 Linear Equations in Two Variables

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CBSE Class 09 Mathematics
Revision Notes
CHAPTER – 4
LINEAR EQUATIONS IN TWO VARIABLES

1. Linear Equations
2. Solution of a Linear Equation
3. Graph of a Linear Equation in Two Variables
4. Equations of Lines Parallel to x-axis and y-axis

• An equation of the form  where a, b and c are real numbers such that a and b are not both zero is called a linear equation in two variables.
• A pair of values of x and y which satisfy the equation  is called a solution of the equation.
• A linear equation in two variables has infinitely many solutions.
• The graph of every linear equation in two variables is a straight line.
• y = 0 is the equation of x-axis and x = 0 is equation of y-axis.
• The graph of  is a straight line parallel to the y-axis.
• The graph of y = a is a straight line parallel to the x-axis.
• An equation of the type y = mx represent a line passing through the origin.
• Every point on the graph of a linear equation in two variables is a solution of the equation. Conversely, every solution of the linear equation in two variables represents a point on the graph of the equation.

Linear Equations in Two Variables class 9 Notes

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CBSE Class-9 Revision Notes and Key Points

Linear Equations in Two Variables class 9 Notes. CBSE quick revision note for Class-9 Mathematics, Chemistry, Maths, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

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