Решить систему уравнений: x+3y=9 3x+5y=19

[latex] \left \{ {{x+3y=9} \atop {3x+5y=19}} \right. \left \{ {{x=9-3y} \atop {3(9-3y)+5y=19}} \right. \left \{ {{x=9-3y} \atop {27-9y+5y=19}} \right. \left \{ {{x=9-3y} \atop {-4y=-8}} \right. \left \{ {{x=9-3y} \atop {y=2}} \right. \left \{ {{x=3} \atop {y=2}} \right. [/latex]