Question

Система уровнений:
{5х+2y=-3
{x-3y=-4

Answer 1

Вот правильное решение

Answer 2

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