x=-21/2 - solution

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Solution for x=-21/2 equation:

x in (-oo:+oo)

x = -21/2 // + -21/2

x-(-21/2) = 0

x+21/2 = 0

x+21/2 = 0 // - 21/2

x = -21/2

x = -21/2

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