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Rezolva ecuatia data mai jos:3/7<2n/28<5/4

Răspuns :

[tex] \frac{3}{7}\ \textless \ \frac{2n}{28} \ \textless \ \frac{5}{4} \\[/tex]

Inmultim cu 28 in toti membrii:

[tex]12\ \textless \ 2n \ \textless \ 35\\[/tex]

Impartim la 2:
[tex]6\ \textless \ n \ \textless \ 17,5\\[/tex]

n ∈ (6, 17.5)