1549 номер 3) Помогите

Решение:
$\left \{ {{12x+4y-1-y+2x=0} \atop {8x-2y+19+x=0}} \right.$
$\left \{ {{14x+3y-1=0} \atop {9x-2y+19=0}} \right.$
$\left \{ {{y= \frac{1-14x}{3} } \atop {9x- \frac{2(1-14x)}{3} +19=0 }} \right.$
$\left \{ {{y= \frac{1-14x}{3}} \atop {27x-2+28x+57=0}} \right.$
$\left \{ {{y= \frac{1-14x}{3}} \atop {55x+55=0}} \right.$
$\left \{ {{y= \frac{1-14x}{3}} \atop {x= -1}} \right.$
$\left \{ {{y= \frac{1+14}{3} } \atop {x= -1}} \right.$
$x =-1; y =5;$