Question 354742
3x-y=1
-y=-3x+1
y=3x-1 (red line.

2x+y=-1
y=-2x-1 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, 3x -1, -2x -1) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions 3x -1 and -2x -1).