Помогите прошу {2(x-2y)=x-8y {5(x+y)=2(x-y)+10 Ответ должен быть такой (8:-2) Это всё одна система

[latex] \left \{ {{2(x-2y)=x-8y} \atop {5(x+y)=2(x-y)+10}} \right. [/latex] [latex] \left \{ {{2x-4y=x-8y} \atop {5x+5y=2x-2y+10}} \right. [/latex] [latex] \left \{ {{2x-4y-x+8y=0} \atop {5x+5y-2x+2y=10}} \right. [/latex] [latex] \left \{ {{x+4y=0} \atop {3x+7y=10}} \right. [/latex] [latex]\left \{ {{-3x-12y=0} \atop {3x+7y=10}} \right. [/latex] [latex]\left \{ {{-5y=10} \atop {3x+7y=10}} \right. [/latex] [latex]\left \{ {{y=-2} \atop {3x+7*(-2)=10}} \right. [/latex] [latex]\left \{ {{y=-2} \atop {3x=24}} \right. [/latex] [latex]\left \{ {{y=-2} \atop {x=8}} \right.[/latex] Ответ:  [latex](8;-2)[/latex]