Y=13x-7y=23x-67 класс. Тема: метод подстановки

[latex] \left \{ {{y=13x-7} \atop {y=23x-6}} \right. [/latex] [latex] \left \{ {{y=13x-7} \atop {(13x-7)=23x-6}} \right. [/latex] [latex] \left \{ {{y=13x-7} \atop {-10x-1=0}} \right. [/latex] [latex] \left \{ {{y=13x-7} \atop {x=-0,1}} \right. [/latex] [latex] \left \{ {{y=-8,3} \atop {x=-0,1}} \right. [/latex] Ответ:(-0,1;-8,3)