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Stiind ca x supra y = 1 supra 3 , calculati x + 2y TOTUL SUPRA y - 2x .

Răspuns :

[tex] \frac{x}{y} = \frac{1}{3} \ \textless \ =\ \textgreater \ 3x=y \ \textless \ =\ \textgreater \ \frac{x+2(3x)}{3x-2x}= \frac{7x}{x} =7[/tex]