\"\"\"\"\"\"

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The equation is \"\".

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According to addition property of equality: Add \"\" to each side.

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\"\"

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\"\" (Apply commutative property of of addition: \"\")

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

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

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

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\"\"

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According to addition property of equality: Add 9 to each side.

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\"\"

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

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

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

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According to division property of equality: Divide each side by 8.

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\"\"

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\"\"                                 (Cancel common terms)

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

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Check:

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To check the solution, substitute \"\" in original equation.

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\"\"

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

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

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

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Compare the values, the equation is true. \"\"

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The value of \"\".