Respuesta :

[tex]\bf \begin{array}{llll} -5x-y=5\\ -5x+y=5\\ -------\\ -10x+0=10 \end{array}\implies -10x=10\implies x=-1[/tex]

so if x = -1, let's plug that in the second equation

-5(-1)+y = 5
5+y = 5
y = 0

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