Question

Система уровнений:
{5х+2y=-3
{x-3y=-4

Answer 1

Вот правильное решение

Answer 2

$\left \{ {{5x+2y=-3} \atop {x-2y=-4}} \right. \\\left \{ {{5x+2y=-3} \atop {x=-4+2y}} \right. \\\left \{ {{5(-4+2y)+2y=-3} \atop {x=-4+2y}} \right. \\\left \{ {{-20+10y+2y=-3} \atop {x=-4+2y}} \right. \\\left \{ {{12y=17} \atop {x=-4+2y}} \right. \\\left \{ {{y=}\frac{17}{12}  \atop {x=-4+2y}} \right. \\\left \{ {{y=\frac{17}{12} \atop {x=-4+ \frac{17}{6} }} \right. \\\left \{ {{y=\frac{17}{12} } \atop {x=-}\frac{7}{6} } \right.$