linear equation x + y – = , write another linear equation in two variables such that the geometrical representation of the pair so formed is: (i) intersecting lines (ii) parallel lines (iii) coincident lines . Draw the graphs of the equations x – y + = and x + y – = . Determine the coordinates of the vertices of the triangle formed by these lines and the x -axis, and shade the triangular region. .
Algebraic Methods of Solving a Pair of Linear Equations In the previous section, we discussed how to solve a pair of linear equations graphically. The graphical method is not convenient in cases when the point representing the