Given XY / (x + y) = 2, find (3x-5y + 3Y) / (- x + 3xy-y)

To simplify the known condition, xy = 2 (x + y)
Substituting into the formula, we get: (3 (x + y) - 10 (x + y)) / (6 (x + y) - (x + y)) = - 7 / 5
Note: 5Y in the formula should be 5xy

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