Question 339643
x-3y=-51 
-3Y=-X-51
Y=-X/-3-51/-3
Y=X/3+17 (RED LINE)
3x-y=-65
-Y=-3X-65
Y=3X+65 (GREEN LINE)
{{{ graph( 300, 200, -30, 5, -10, 70, x/3 +17, 3x +65) }}} (graph 300x200 pixels, x from -30 to 5, y from -10 to 70, of TWO functions x/3 +17 and 3x +65).
INTERCEPTS (-18,11)