[tex]\begin{gathered} 3x+y-(-2x+y)=-2-8 \\ 5x=-10 \\ x=-2 \end{gathered}[/tex]
Now we substitute the value of x into the first equation to get the value of y
[tex]\begin{gathered} -2\cdot-2+y=8 \\ 4+y=8 \\ y=8-4=4 \end{gathered}[/tex]
Finally the solution is (-2,4)
