A new linear temperature scale, degrees Zunzol (∘Z∘Z), is based on the freezing point and boiling point of a newly discovered compound zunzol. The freezing point of zunzol, −87.9 ∘C,−87.9 ∘C, is defined as 0 ∘Z,0 ∘Z, and the boiling point of zunzol, 82.2 ∘C,82.2 ∘C, is defined as 100 ∘Z.100 ∘Z. What is the freezing point of water in degrees Zunzol?

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