Question 120897
2X-Y=4 OR -Y=-2X+4 OR Y=2X-4 (RED LINE)
2X-Y=6 OR -Y=-2X+6 OR Y=2X-6 (GREEN LINE)
{{{ graph( 300, 200, -6, 5, -10, 10, y = 2x -4, y = 2x -6) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = 2x -4 and y = 2x -6). 
THERE IS NO UNIQUE SOLUTION TO THESE 2 EQUATIONS & THEY DO NOT INTERSECT.