х
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1 11
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у ху
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Answers
Answered by
1
Answer:
xy = -6
Step-by-step explanation:
все суммируем
x - y + xy + x - y - xy = -10
2x - 2y = -10
2(x - y) = -10
x - y = -5
теперь подставляем в систему
-5 + xy = -11
xy = -6
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