Chapter I : Linear Equations in two variables in two variables

Example 4. Solve the following system of equation:

Solution: multiplying equation (1) by 4 and equation (2) by 7 we get

Subtracting (3) fr0m (4) we get

Or, 19/v = 38

Or, 36 v = 19

Or, v = 19/38

Or, v = 1/2

Putting v = 1/2 in (1) we get

Or, 22 - 7/u = 1

Or, 21 = 7/u

Or, 21u = 7

Or, u = 7/21

Or, u = 1/3

 

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Subjects Maths (Part-1) by Mr. M. P. Keshari
Chapter 1 Linear Equations in Two Variables
Chapter 2 HCF and LCM
Chapter 3 Rational Expression
Chapter 4 Quadratic Equations
Chapter 5 Arithmetic Progressions
Chapter 6 Instalments
Chapter 7 Income Tax
Chapter 8 Similar Triangles