Pomóżcie plis

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[tex]\left \{ {{x-2y=8} \atop {x+y=2}} \right.[/tex]

[tex]\left \{ {{2(x+y)= -3 +2y} \atop {3(x+1) =2(x+4)}} \right.[/tex]
[tex]\left \{ {{\frac{x-2y}{3} -\frac{x-y}{2} =1 } \atop {\frac{x+2y}{2} - \frac{x +4y}{2} = 2 }} \right.[/tex]