Question 256926
Add the equations together and solve for x.
{{{ 2x+y+3x-y=4+11}}}

{{{ 5x=15}}}
{{{ x=3}}}
Now use either equation to solve for y.
{{{3x-y=11}}}
{{{y=3x-11}}}
{{{y=9-11}}}
{{{y=-2}}}