\"\"\"\"

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The equation is \"\"

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According to subtraction property of equality: Subtract 10x from each side

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\"\"

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\"\"                  (Commutative property: \"\")                  

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  \"\"                                 (Additive inverse property: \"\")

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  \"\"                                       (Additive identity property: \"\")

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  \"\"                                    (Substitute x = 3)

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

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

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  \"\"

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  The value of \"\".