Question

Помогите решить функцию
$left { {{2x+y=1} atop { frac{x-2}{3}+ frac{y}{4} =-1 }} right.$

Answer 1

$left { {{2x+y=1} atop { frac{x-2}{3}+ frac{y}{4} =-1 |*12 }} right. \ left { {{2x+y=1|*-2} atop { 4x-8+3y =-12 }} right. \ left +{ {{-4x-2y=-2} atop { 4x-8+3y =-12 }} right. \ left { {{y-8=-14} atop {2x+y=1}} right. \ left { {{y=-6} atop {2x-6=1}} right. \ left { {{y=-6} atop {2x=7}} right. \ left { {{y=-6} atop {x=3 frac{1}{2} }} right.$