Ответ: x=-2 ; y=3

[tex]\left \{ {{5x + 2y = - 4 \: \:| \times 3 \: \: \: \: } \atop { - 2x + 3y = 13 \: \:| \times ( - 2)}} \right. \\ \\ \left \{ {{15x + 6y = - 12} \atop {4x - 6y = - 26}} \right. + \\ 19x = - 38 \\ x = - 2 \\ \\ - 2x + 3y = 13 \\ - 2 \times ( - 2) + 3y = 13 \\ 4 + 3y = 13 \\ 3y = 9 \: \: \: \: \: \: \: \: \: y = 3[/tex]