Ответ:
25 - 4(x + 7) = x (1 + y) - 4 - y(x + 7),
x (2 - y) + 24.
2
y (6 - x) + 18
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Ответ:
25 - 4(x + 7) = x (1 + y) - 4 - y(x + 7),
x (2 - y) + 24.
2
y (6 - x) + 18