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Media aritmetica a trei numere rationale pozitive este 17/36 . Suma a doua dintre ele este 7/12. Calculati celalalt numar . PLEASE!!!

Răspuns :

[tex] \frac{x+y+z}{3} [/tex]=[tex] \frac{17}{36} [/tex]
x+y+z=3x[tex] \frac{17}{36} [/tex]
x+y+z=[tex] \frac{17}{12} [/tex]
[tex] \frac{7}{12} [/tex]+z=[tex] \frac{17}{12} [/tex]
z=[tex] \frac{17}{12} [/tex]-[tex] \frac{7}{12} [/tex]
z=[tex] \frac{10}{12} [/tex]
z=[tex] \frac{5}{6} [/tex]