Question

Решите систему уравнений способом подстановки ПОМОГИТЕ СРОЧНО НАДО !!!​

Answer 1

$\left \{ {{x-5y=23} \atop {7x+10y=-19}} \right. \\\left \{ {{x=23+5y} \atop {7(23+5y)+10y=-19}} \right. \\\left \{ {{x=23+5y} \atop {161+35y+10y=-19}} \right. \\\left \{ {{x=23+5y} \atop {45y=-180}} \right. \\\left \{ {{x=23+5y} \atop {y=-4}} \right. \\\left \{ {{x=23+5*(-4)} \atop {y=-4}} \right. \\\left \{ {{x=3} \atop {y=-4}} \right.$

Ответ: -4; 3