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\"\"

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The statement is “\"\"

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\"\"        (Product of same signs is positive)

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\"\"   

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\"\"                    (Cancel common terms) \ \

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\"\"

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

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\"\"                          (Associative property of multiplication)

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\"\"                          (Product of different signs is negative)

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

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\"\"

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The product is  – 40c.

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