3.1 INTRODUCTION

(PAIR OF LINEAR EQUATIONS IN TWO VARIABLES)

3.1 INTRODUCTION:

• For any linear equation, each solution (x, y) corresponds to a point on the line.                                             General form is given by ax + by + c = 0. where a,b  and c are real numbers  (a,b ≠ 0)  is  called a linear equation in two variables  x  and  y.
• A pair of linear equations in two variables can be represented and solved, by
  (i) Graphical method
  (ii) Algebraic method
• General form of a linear pair of equations in two variables is
• The graph of a linear equation is a straight line.