\"\"

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The expression is \"\".

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\"\"                         (Write percent as fraction)

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\"\"                       (Substitute \"\")

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\"\"                             (Subtract: \"\")

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\"\"                      (Divide each side by 20)

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\"\"                                 (Divide: \"\")

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

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\"\"                                         (Divide: \"\")\"\"

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The value of \"\" is 18.