[tex]Linear \ Equations : \\ y=ax+b\\\\\begin{cases} x+y=8 \\ x-y= -4 \end{cases}\\\\\begin{cases} y=-x+8 \\ -y=-x -4 \ \ / *(-1) \end{cases}[/tex]
[tex]\begin{cases} y=-x+8 \\ y= x + 4 \end{cases}\\+-------\\2y=12\ \ / :2\\y=6 \\\\ 6=-x+8\\x=8-6\\x=2\\\\ Answer: \ \ \begin{cases} x=2 \\ y=6 \end{cases}[/tex]
