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The equation is v \"\" 9 = 14.

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According to additon property of equality: If a = b, then a + c = b + c.

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v \"\" 9 + 9 = 14 + 9                (Add 9 to each sides)

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  v = 14 + 9                             (Additive inverse property: \"\"9 + 9 = 0)

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  v = 23                                   (Add: 14 + 9 = 23)

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  Check:

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  To check the solution, substitute v = 23 in original equation.  

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  v \"\" 9 = 14\"\" 23 \"\" 9 = 14        

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  14 = 14                              (Subtract: 23\"\"9 = 14 )

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  The equation is true. 

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The value of v = 23.