\"\"

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The equation is \"\".

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Apply subtraction property of equality: Subtract 5a from each side.

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\"\"

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Apply commutative property of addition: a + b = b + a.

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\"\"

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\"\"                 (Apply additive inverse property: \"\")

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

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Apply division property of equality: Divide each side by negative 13.

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\"\"

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\"\"                      (Cancel the common terms)\"\"

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The value of \"\".