Ответ:
[tex]4x + 5y = 16 \\ 3x - 5y = - 23 \\ \\ 5y = 16 - 4x \\ 3x - 16 + 4x = - 23 \\ \\ 5y = 16 - 4x \\ 7x = - 7 \\ \\ 5y = 16 + 4 \\ x = - 1 \\ \\ 5y = 20 \\ x = - 1 \\ \\ y = 4 \\ x = - 1[/tex]
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Ответ:
[tex]4x + 5y = 16 \\ 3x - 5y = - 23 \\ \\ 5y = 16 - 4x \\ 3x - 16 + 4x = - 23 \\ \\ 5y = 16 - 4x \\ 7x = - 7 \\ \\ 5y = 16 + 4 \\ x = - 1 \\ \\ 5y = 20 \\ x = - 1 \\ \\ y = 4 \\ x = - 1[/tex]