Question

помогите пожалуйста​

Answer 1

Ответ:

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