Уравнение, заранее спасибо

$\left \{ {{1/3x+1/4y-2=0} \atop {5x-y=11}} \right. \left \{ {{1/3x+1/4y-2=0} \atop {x=(11+y)/5}} \right. \left \{ {{1/3x+1/4y-2=0} \atop {x=(11+y)/5}} \right. \left \{ {(1/3)*(11+y)/5+1/4y-2=0} \atop {x=(11+y)/5}} \right. \left \{ 11/15+1/15y+1/4y-2=0} \atop {x=(11+y)/5}} \right. \left \{ (4+15)/60y-19/15=0} \atop {x=(11+y)/5}} \right. \left \{ 19/60y=19/15} \atop {x=(11+y)/5}} \right. \left \{ y=19/15*60/19} \atop {x=(11+y)/5}} \right. \left \{ y=4} \atop {x=(11+y)/5}\right.$ $\left \{ y=4} \atop {x=(11+4)/5}\right. \left \{ y=4} \atop {x=3}\right.$
Ответ: (3;4).