[tex]x + y = 7 \\ 2x + y = 8 \\ \\ y = 7 - x \\ 2x + 7 - x = 8 \\ \\ x = 8 - 7 \\ x = 1 \\ \\ y = 7 - 1 = 6[/tex]
Ответ: (1;6)
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[tex]x + y = 7 \\ 2x + y = 8 \\ \\ y = 7 - x \\ 2x + 7 - x = 8 \\ \\ x = 8 - 7 \\ x = 1 \\ \\ y = 7 - 1 = 6[/tex]
Ответ: (1;6)