Question

На фото вопрос сделать надо третий ​

Answer 1

$\displaystyle\bf\\\left \{ {{y=11-2x} \atop {5x-4y=8}} \right. \\\\\\\left \{ {{y=11-2x} \atop {5x-4\cdot(11-2x)=8} \right.\\\\\\\left \{ {{y=11-2x} \atop {5x-44+8x=8}} \right. \\\\\\\left \{ {{y=11-2x} \atop {13x=52}} \right. \\\\\\\left \{ {{x=4} \atop {y=11-2\cdot 4}} \right. \\\\\\\left \{ {{x=4} \atop {y=3}} \right. \\\\\\Otvet: \ \Big(4 \ ; \ 3\Big)$