x+3y=-2 5x-4y=11 giúp tiếp ik nào

$\left \{ {{x+3y=-2} \atop {5x-4y=11}} \right.$ 

<=> $\left \{ {{x=-2-3y} \atop {5x-4y=11}} \right.$ 

<=> $\left \{ {{x=-2-3y} \atop {5(-2-3y)-4y=11}} \right.$ 

<=> $\left \{ {{x=-2-3y} \atop {-19y=21}} \right.$ 

<=> $\left \{ {{x=-2-3y} \atop {y=-\frac{21}{19}}} \right.$ 

<=> $\left \{ {{x=-2-3(-\frac{21}{19})} \atop {y=-\frac{21}{19}}} \right.$ 

<=> $\left \{ {{x=\frac{25}{19}} \atop {y=-\frac{21}{19}}} \right.$