Помогите решить 6 очень прошу

Решите задачу:

$1)\; \; \left \{ {{x=y} \atop {y=7x-5}} \right. \; \left \{ {{x=y} \atop {x=7x-5}} \right. \; \left \{ {{x=y} \atop {6x=5}} \right. \; \left \{ {{y=\frac{5}{6}} \atop {x=\frac{5}{6}}} \right. \\\\\\2)\; \; \left \{ {{x+y=19} \atop {y=7x-5}} \right. \; \left \{ {{y=19-x} \atop {y=7x-5}} \right. \; \left \{ {{y=19-x} \atop {19-x=7x-5}} \right. \; \left \{ {{y=19-x} \atop {8x=24}} \right. \; \left \{ {{y=16} \atop {x=3}} \right.$