Question 460871
{{{ graph( 300, 300, -6, 5, -1, 10, 7-x, 7+x) }}} 
Point (0,7)
{{{system(x=0,y=7)}}} the soluotion of the system
Check
{{{system(0+7=7,7-0=7)}}}
{{{system(7=7,7=7)}}} correct