Question 139109
x + y = 7
y=-x+7 (red line)
x - y = -5
-y=-x-5
y=x+5 (green line)
{{{ graph( 300, 200, -6, 5, -10, 10, -x +7, x +5) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -x +7 and x +5).
ANSWER (1,6)