Explicación paso a paso:
[tex]x - y = 1 \\ x = 1 + y \\ 2x + y = 8 \\ 2x = 8 - y \\ x = \frac{8 - y}{2} \\ \frac{8 - y}{2} = 1 + y \\ 8 - y = 2 + 2y \\ - 2 + 8 = 2y + y \\ 6 = 3y \\ y = \frac{6}{3} = 2 \\ y = 2[/tex]
[tex]x - y = 1 \\ x - 2 = 1 \\ x = 1 + 2 \\ x = 3[/tex]
[tex]x - y = 3 - 2 = 1 \\ 2x + y = 2 \times 3 + 2 = 6 + 2 = 8[/tex]
espero te sirva
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Explicación paso a paso:
[tex]x - y = 1 \\ x = 1 + y \\ 2x + y = 8 \\ 2x = 8 - y \\ x = \frac{8 - y}{2} \\ \frac{8 - y}{2} = 1 + y \\ 8 - y = 2 + 2y \\ - 2 + 8 = 2y + y \\ 6 = 3y \\ y = \frac{6}{3} = 2 \\ y = 2[/tex]
[tex]x - y = 1 \\ x - 2 = 1 \\ x = 1 + 2 \\ x = 3[/tex]
[tex]x - y = 3 - 2 = 1 \\ 2x + y = 2 \times 3 + 2 = 6 + 2 = 8[/tex]
espero te sirva