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Omni-MATH / A four-digit number YEAR is called very good if the system beginaligned & Y x+E y+A z+R w=Y & R x+Y y+E z+A w=E & A x+R y+Y z+E w=A & E x+A y+R z+Y w=R endaligned of linear … · Discussion

Discussing A four-digit number YEAR is called very good if the system begin{aligned} & Y x+E y+A z+R w=Y & R x+Y y+E z+A w=E & A x+R y+Y z+E w=A & E x+A y+R z+Y w=R end{aligned} of linear … · Omni-MATH

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