Question 236851
y+2x+1=0
y=-2x-1 (red line) 
3y+3=2x
3y=2x-3
y=2x/3-3/3
y=2x/3-1 (green line)
{{{ graph( 300, 300, -6, 6, -6, 6, -2x -1, 2x/3 -1 ) }}} (graph 300x300 pixels, x from -6 to 6, y from -6 to 6, of TWO functions -2x/3 -1 and 2x/3 -1). 
Answer (0,-1)