Question

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

Answer 1

$\frac{3}{7}\ \textless \ \frac{2n}{28} \ \textless \ \frac{5}{4}$

Inmultim cu 28 in toti membrii:

$12\ \textless \ 2n \ \textless \ 35$

Impartim la 2:
$6\ \textless \ n \ \textless \ 17,5$

n ∈ (6, 17.5)