\"\"\"\"

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According to Means-extremes Property of proportion: If \"\",

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then ad = bc.

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\"\"            (Cross products)\"\"

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\"\"                   (Multiply: \"\")

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\"\"              (Divide each side by 28)

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\"\"                     (Cancel common terms)

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y = 5                           (Divide: \"\")\"\"

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The value of y = 5.