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[tex]\it 2x=7y \Rightarrow \dfrac{x}{y}=\dfrac{7}{2};\ \ \ \dfrac{y}{x}=\dfrac{2}{7} \\ \\ \\ \dfrac{x}{y}+\dfrac{y}{x} = \dfrac{7}{2}+\dfrac{2}{7}=\dfrac{53}{14}[/tex]