x=3-y 3x-2y=10 (решить способом подстановки,решите пожалуйста)

Решите задачу:

$\left \{ {{x=3-y} \atop {3x-2y=10}} \right. \\ \left \{ {{x=3-y} \atop {3(3-y)-2y=10}} \right. \\ \left \{ {{x=3-y} \atop {9-3y-2y=10}} \right. \\ \left \{ {{x=3-y} \atop {-5y=1}} \right. \\ \left \{ {{x=3-y} \atop {y=-0,2}} \right. \\ \left \{ {{x=3,2} \atop {y=-0,2}} \right. \\$