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Targoviste44id

[tex]\it \dfrac{7}{3x+10y}\geq\dfrac{7}{7x+8y} \Rightarrow 3x+10y\leq7x+8y \Rightarrow 10y-8y\leq 7x-3x \Rightarrow \\ \\ \\ \Rightarrow 2y\leq4x|_{:2} \Rightarrow y\leq2x[/tex]

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