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Afla necunoscuta 94-3•d=82

Răspuns :

94-3d=82
3d=94-82
3d=12
d=12:3
d=4

V: 94-3x4=94-12=82
94-3•d=82
3d=94-82
3d=12
d=12:3
d=4
Verificare:94-3•4=94-12=82