Question

помогите пожалуйста​

Answer 1

Ответ:

$\left \{ {{7x-2y=1} \atop {3x-5y=12}} \right. \\\left \{ {{x=\frac{2y-1}{7} } \atop {3x-5y=12}} \right.\\ \left \{ {{x=\frac{2y-1}{7} } \atop {\frac{6y-3}{7}-5y=12 }} \right. \\\left \{ {{x=\frac{2y-1}{7}} \atop {6y-3-35y=84}} \right. \\\left \{ {{x=\frac{2y-1}{7}} \atop {-29y=87}} \right. \\\left \{ {{y=-3} \atop {x=\frac{2*(-3)-1}{7} }} \right. \\\left \{ {{y=-3} \atop {x=-1}} \right.$