Решить систему неравенств: 5х-4у=13 2х-у=4

[latex] \left \{ {{5x-4y=13} \atop {-y=4-2x}} \right. [/latex] [latex]\left \{ {{5x-4(2x-4)=13} \atop {y=2x-4}} \right. [/latex] [latex]\left \{ {{5x-8x+16=13} \atop {y=2x-4}} \right.[/latex] [latex]\left \{ {{-3x=-3} \atop {y=2x-4}} \right.[/latex] [latex]left \{ {{x=1} \atop {y=-2}} \right.[/latex]