solve the following pair of linear equations graphically: x+y+1=0,2x-y-4=0. also shade the triangular region formed by these lines obtained and x-axis.

to draw the straight line x+y+1=0,

the points are (-1, 0) and (0, -1). plot these points and join them. that will be the required equation.

to draw the straight line 2x-y-4=0.

the points are (2, 0 ) and (0, -4). plot these points and join them, that will be the required equation.

thus from the graph it is clear that the intersection point is A(1, -2).

thus x =1 and y = -2 is the solution of the given set of linear equations.

ABC is the required shaded region.

hope this helps you.

cheers!!

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