Question

Помогите пожалуйста!!!!!!!!

Answer 1

$\left \{ {{3x+y=1} \atop {5x-y=6}} \right. \\\\ \left \{ {{3x+y+5x-y=1+6} \atop {3x+y=1}} \right. \\\\ \left \{ {{8x=7} \atop {y=1-3x}} \right. \\\\ \left \{ {{x=\frac{7}{8}} \atop {y=1-3*\frac{7}{8}=1-\frac{21}{8}=-\frac{13}{8}}} \right. \\\\ \left \{ {{x=\frac{7}{8}} \atop {y=-\frac{13}{8}}} \right.$

Ответ: $(\frac{7}{8};\ -\frac{13}{8})$