Question 121802
3X+Y=6 OR Y=-3X+6 (RED LINE)
3X-Y=0 OR -Y=-3X OR Y=3X (GREEN LINE)
{{{ graph( 300, 200, -6, 5, -10, 10, y = -3x +6, y = 3x) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -3x +6 and y = 3x). 
SOLUTION (1,3).
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Coordinates for the red line would be (0,6) & 2,0)
Coordinates foir the green line would be (0,0) & (2,6)