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Ответ:

Надеюсь, что помогла

Объяснение:

[tex]\displaystyle\bf\\\left \{ {{x+y=2} \atop {7x-5y=-34}} \right. \\\\\\\left \{ {{y=2-x} \atop {7x-5\cdot(2-x)=-34}} \right. \\\\\\\left \{ {{y=2-x} \atop {7x-10+5x=-34}} \right. \\\\\\\left \{ {{y=2-x} \atop {12x=10-34}} \right.\\\\\\\left \{ {{y=2-x} \atop {12x=-24}} \right. \\\\\\\left \{ {{y=2-(-2)} \atop {x=-2}} \right. \\\\\\\left \{ {{y=2+2} \atop {x=-2}} \right. \\\\\\\left \{ {{y=4} \atop {x=-2}} \right. \\\\\\Otvet \ : \ (-2 \ ; \ 4)[/tex]