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Determinati 4x+7y / 5x, daca x/y = 2

Răspuns :

[tex] \frac{x}{y} =2 \Rightarrow x=2y. \\ \\ \frac{4x+7y}{5x}= \frac{8y+7y}{10y}= \frac{15y}{10y}= \frac{3}{2} . [/tex]