Question: If StartFraction x Over y EndFraction equals StartFraction a Over b EndFractionxy = ab , anot equals 0 and xnot equals 0 , is true,

If
StartFraction x Over y EndFraction equals StartFraction a Over b EndFractionxy=ab,
anot equals0
and
xnot equals0,
is true, what other proportions do you know are true?

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