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Fie m/n=3.Determină 2m+10n/5m

Răspuns :

m/n=3
m=3n
2m+10n/5m=0
2×3n+10n/5×3n=0
6n+10n/15n=0
(90n^2+10n)/15n=0
n10(9n+1)/15n=0
2(9n+10)/3=0
n=-10/9