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2x 2y. 6x−7y2x−5y. -(X-2,7+Y)-(6,5-X). Y=2x+5. X 5y 2x-7y 6 метод подстановки.
6x−7y2x−5y. -(X-2,7+Y)-(6,5-X). Y=2x+5. X 5y 2x-7y 6 метод подстановки.

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