Question 158562
L: x – y = -2
-y=-x-2
y=x+2 (red line)
M: x + 2y = 7
2y=-x+7
y=-x/2+7/2 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, x +2, -x/2 +7/2) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions x +2 and -x/2 +7/2). 
SOLUTION/INTERSECTON: (1,3)