Question 164847
x-y<10 or -y<-x+10 or y>x-10 (red line)
x+y&#8804;8 or y<=-x+8 (green line)
{{{ graph( 300, 200, -6, 15, -10, 10, x -10, -x +8) }}} (graph 300x200 pixels, x from -6 to 15, y from -10 to 10, of TWO functions x -10 and -x +8). 
Answer=(9,-1)