Solve the following systems of equations graphically:
3x + y + 1 = 0
2x - 3y + 8 = 0
x = -1, y = 2
Solve the following system of linear equations graphically and shade the region between the two lines and x-axis;
(i) 2x + 3y = 12,
x - y = 1
(ii) 3x + 2y - 4 = 0,
2x - 3y - 7 = 0
(iii) 3x + 2y - 11 = 0
2x - 3y + 10 = 0