 Change Matrix

### Linear Equations

CBSE 10, CBSE 9, CBSE 8, CBSE 7

#### 01. Basic Introduction to Linear Equations

This video helps students to find answer to following questions:

• What is an equation?

• Why do we need equations?

• How do we frame equations?

• What is means by solution of an equation?

• How do we solve equations

This video helps students to find answer to following questions:

• What is an equation?

• Why do we need equations?

• How do we frame equations?

• What is means by solution of an equation?

• How do we solve equations

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#### 02. Graphical Solution of Linear Equations

This video helps students to:

• Plot two simultaneous equations in the same graph.

• Identify the nature of solution from the graph.

• Find the solution if it is unique.

• Shade/identify the area bound by the lines/axes.

This video helps students to:

• Plot two simultaneous equations in the same graph.

• Identify the nature of solution from the graph.

• Find the solution if it is unique.

• Shade/identify the area bound by the lines/axes.

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#### 03. Relation between Nature of solutions and Coefficients of the equations

This video helps students to:

• Find the ratios of coefficients.

• Compare the ratios to find the nature of solutions

• Find the missing constant when nature of solution is given.

This video helps students to:

• Find the ratios of coefficients.

• Compare the ratios to find the nature of solutions

• Find the missing constant when nature of solution is given.

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#### 04. Substitution Method of solving a pair of linear equations

This video helps students to:

• Find the solution of two simultaneous equation using the method of substitution.

This video helps students to:

• Find the solution of two simultaneous equation using the method of substitution.

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#### 05. Equating the Coefficients (Elimination) Method of solving a pair of linear equations

This video helps students to:

• Find the solution of two simultaneous equation using the method of elimination (Eliminating the Coefficients).

This video helps students to:

• Find the solution of two simultaneous equation using the method of elimination (Eliminating the Coefficients).

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#### 06. The Cross Multiplication Method of solving a pair of linear equations

This video helps students to:

• Find the solution of two simultaneous equation using the method of cross multiplication.

This video helps students to:

• Find the solution of two simultaneous equation using the method of cross multiplication.

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#### 07. The Logic behind Cross Multiplication method of solution

This video helps students to:

• Understand the derivation and the logic behind the cross multiplication method

This video helps students to:

• Understand the derivation and the logic behind the cross multiplication method

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#### 08. Solving Special Equations of type: Ax + By = C1 Bx + Ay = C2

This video helps students to:

• Find the solution of equations where the coefficients of X and Y are exchanged in both equations.

This video helps students to:

• Find the solution of equations where the coefficients of X and Y are exchanged in both equations.

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#### 09. Solving Equations Reducible to the Linear Form

This video helps students to:

• Find the solution of equations which are reduced to linear form (by substitution) and then solved.

This video helps students to:

• Find the solution of equations which are reduced to linear form (by substitution) and then solved.

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#### 10. Solving equations with three variables and with coefficients as variables

This video helps students to:

• Apply the substitution method to solve linear equations of 3 variables.

• Solve the linear equations which have coefficients as the variables (arbitrary constants)

This video helps students to:

• Apply the substitution method to solve linear equations of 3 variables.

• Solve the linear equations which have coefficients as the variables (arbitrary constants)

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