Решите систему уравнений 2x-y=-0,3 и 7x+10y=16,5

Решите задачу:

$\left \{ {{2x-y=-0.3} \atop {7x+10y=16.5}} \right. \\ \left \{ {{y=0.3+2x} \atop {7x+10y=16.5}} \right. \\ \left \{ {{y=0.3+2x} \atop {7x+10(0.3+2x)=16.5}} \right. \\ \left \{ {{y=0.3+2x} \atop {27x=13.5}} \right. \\ \left \{ {{y=0.3+2x} \atop {x=0.5}} \right. \\ \left \{ {{y=1.3} \atop {x=0.5}} \right.$