\"\"

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The equation is \"\".

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

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\"\"                      (Add: \"\")\"\"

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\"\"      (Subtract 6.4 from each side)

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According to Additive inverse property: For any number a + (– a) = 0.

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So, \"\"

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According to Additive identity property: For any number 0 + a = a.

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So, \"\"

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\"\"

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The value of \"\".