Question 184925
-2x-2y=-14y
-2y+14y=2x
12y=2x
y=2x/12
y=x/6 (red line)

-2x+4y=-12
4y=2x-12
y=2x/4-12/4
y=x/2-3 (green line)
Solution (9,1.5)
{{{ graph( 300, 200, -6, 15, -10, 10, y = x/6, y = x/2 -3) }}} (graph 300x200 pixels, x from -6 to 15, y from -10 to 10, of TWO functions y = x/6 and y = x/2 -3).