Пошаговое объяснение:
m/n=2,5=25/10=5/2
m/n=5/2 => m=5n/2
3n/(n+2m)=3n/(n+2×5n/2)=3n/(n+5n)=
=3n/6n=3/6=1/2
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Пошаговое объяснение:
m/n=2,5=25/10=5/2
m/n=5/2 => m=5n/2
3n/(n+2m)=3n/(n+2×5n/2)=3n/(n+5n)=
=3n/6n=3/6=1/2