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{2x2+2y2=5xyx−yx+y=ab\large \begin{cases} 2x^2 + 2y^2 = 5xy \\ \dfrac{x-y}{x+y} = \dfrac{a}{b} \end{cases}⎩⎪⎨⎪⎧2x2+2y2=5xyx+yx−y=ba
Real numbers xxx, yyy, aaa, and bbb, where aaa and bbb are positive coprime integers, satisfy the system of equations above. Find a×b−a+b÷aa \times b - a + b \div aa×b−a+b÷a.
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