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Ответ:

Объяснение:

[tex]\left \{ {{x-3y=8} \atop {2x-y=6}} \right.[/tex]

[tex]\left \{ {{x-3y=8} \atop {y=2x-6}} \right.[/tex]

[tex]\left \{ {{x-3(2x-6)=8} \atop {y=2x-6}} \right.[/tex]

[tex]\left \{ {{x-6x+18=8} \atop {y=2x-6}} \right.[/tex]

[tex]\left \{ {{-5x=8-18} \atop {y=2x-6}} \right.[/tex]

[tex]\left \{ {{-5x=-10} \atop {y=2x-6}} \right.[/tex]

[tex]\left \{ {{x=2} \atop {y=2*2-6}} \right.[/tex]

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