Question

Система уровнений
2x+5y=10
3x-2y =1
С пояснением=)

Answer 1

$\left \{ {{2x+5y=10}|*2 \atop {3x-2y=1|*5}} \right.\\\\+\left \{ {{4x+10y=20} \atop {15x-10y=5}} \right. \\-------\\19x=25\\\\x=1\frac{6}{19} \\\\2y=3x-1=3*\frac{25}{19}-1=\frac{82}{19}-1=\frac{63}{19} \\\\y=\frac{63}{19}:2=\frac{63}{19}*\frac{1}{2}=\frac{63}{38}=1\frac{25}{38}\\\\Otvet:\boxed{(1\frac{6}{19};1\frac{25}{38})}$