Question 150691
{{{x+y=13}}}
{{{x-y=-3}}}
Add the two equations together,
{{{2x=10}}}
{{{x=5}}}
From the first,
{{{x+y=13}}}
{{{5+y=13}}}
{{{y=8}}}
(5,8)
{{{ graph( 300, 300, -10, 10
, -10, 10, 13-x, x+3) }}}