To solve a system of first degree inequalities graphically, we must:
draw on the same plane the graph of each inequality;
determine the region corresponding to the intersection of the two semiplanes.
Example: Give the graphic resolution of the system:
Tracing the Straight -x + y = 4 and 3x + 2y = 6.
Table -x + y = 4
Table 3x + 2y = 6