81/2-s=7

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Solution for 81/2-s=7 equation: 


s in (-oo:+oo)

81/2-s = 7 // - 7

81/2-s-7 = 0

67/2-s = 0 // - 67/2

-s = -67/2 // * -1

s = 67/2

s = 67/2

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