Решите систему уравнений методом подстановки: (примеры в фото)

Решите задачу:

$1)\left \{ {{x-y=7} \atop {3x+2y=16}} \right.\\\\\left \{ {{x=y+7} \atop {3*(y+7)+2y=16}} \right.\\\\\left \{ {{x=y+7} \atop {3y+21+2y=16}} \right.\\\\\left \{ {{x=y+7} \atop {5y=-5}} \right.\\\\\left \{ {{y=-1} \atop {x=-1+7}} \right.\\\\\left \{ {{x=6} \atop {y=-1}} \right.\\\\Otvet:\boxed{(6;-1)}$

$2)\left \{ {{2x+y=-1} \atop {5x-3y=-19}} \right.\\\\\left \{ {{y=-2x-1} \atop {5x-3*(-2x-1)=-19}} \right.\\\\\left \{ {{y=-2x-1} \atop {5x+6x+3=-19}} \right.\\\\\left \{ {{y=-2x-1} \atop {11x=-22}} \right.\\\\\left \{ {{x=-2} \atop {y=-2*(-2)-1}} \right.\\\\\left \{ {{x=-2} \atop {y=4-1}} \right. \\\\\left \{ {{x=-2} \atop {y=3}} \right.\\\\Otvet:\boxed{(-2;3)}$