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Calcuati numarul necuboscut 96-(3•i•2)=78

Răspuns :

96-(3×i×2)=78
3×i×2=96-78
3×i×2=18
3×i=18:2
3×i=9
i=9:3
i=3
96-(3×i×2)=78
96-6i=78
-6i=-18
i=3