Question

Решите ! (подробно распишите еще) 

Answer 1

$\left \{ {{y=11-2x} \atop {5x-4y=8}} \right. \\\\ \left \{ {{y=11-2x} \atop {5x-4(11-2x)=8}} \right. \\\\ \left \{ {{y=11-2x} \atop {5x-44+8x=8}} \right. \\\\ \left \{ {{y=11-2x} \atop {5x+8x=8+44}} \right. \\\\ \left \{ {{y=11-2x} \atop {13x=52}} \right. \\\\ \left \{ {{y=11-2x} \atop {13*x=13*4}} \right. \\\\ \left \{ {{y=11-2x} \atop {x=4}} \right. \\\\ \left \{ {{y=11-2*4=11-8=3} \atop {x=4}} \right. \\\\ \left \{ {{x=4} \atop {y=3}} \right.$

ответ: $(4;\ 3)$