Question 784814
{{{x+3=9 }}}

{{{x=9-3 }}}

{{{x=6 }}}

the graph will be a vertical line intersecting the  x-axis at {{{6}}}


{{{drawing(300,300,   -10, 10, -10, 10,  blue(line(6,10,6,-10)), grid(0),
graph( 300, 300, -10,10, -10,10)) }}}