Explicación paso a paso:
[tex]x + 3y = - 1 \\( 2x- y = 5)3 \\ \\ x + 3y = - 1 \\ 6x - 3y = 15 \\ - - - - - - - \\ 7x = 14 \\ x = 2 \\ \\ 2 + 3y = - 1 \\ 3y = - 3 \\ y = - 1[/tex]
D) {2; -1}
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Explicación paso a paso:
[tex]x + 3y = - 1 \\( 2x- y = 5)3 \\ \\ x + 3y = - 1 \\ 6x - 3y = 15 \\ - - - - - - - \\ 7x = 14 \\ x = 2 \\ \\ 2 + 3y = - 1 \\ 3y = - 3 \\ y = - 1[/tex]
D) {2; -1}