Solve the system of linear equations graphically 5x - 7y = -50; 5x + 7y = 20. Also write the coordinates of the points where they meet at x - axis. Shade the triangular region.

5x-7y=-50

5x+7y=20

--------------

10x=-30

x=-3

at x=-3, y=5

The point at which these two lines intersects each other is  (-3,5)

Now the point at which line 5x-7y=-50 intersects x -axis is (-10,0)

and the  at which line 5x+7y=20 intersects x -axis is (4,0)