Объяснение:
[tex]x+y=1\ \ \ \ 2x-y=5 \\y=1-x.\\[/tex]
| x | 0 | 1 |
| y | 1 | 0 |
[tex]2x-y=5\\y=2x-5.[/tex]
| x | 1 | 2 |
| y | -3 | -1 |.
Ответ: (2;-1).
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Объяснение:
[tex]x+y=1\ \ \ \ 2x-y=5 \\y=1-x.\\[/tex]
| x | 0 | 1 |
| y | 1 | 0 |
[tex]2x-y=5\\y=2x-5.[/tex]
| x | 1 | 2 |
| y | -3 | -1 |.
Ответ: (2;-1).