Question 903393
{{{x+y=4}}}
{{{y=-x+4}}}
.
.
{{{graph(300,300,-5,5,-5,5,-x+4)}}}
.
.
{{{x-y=-2}}}
{{{y=x+2}}}
.
.
{{{graph(300,300,-5,5,-5,5,-x+4,x+2)}}}
.
.
(1,3)