x=-21/31 - solution

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Solution for x=-21/31 equation:

x in (-oo:+oo)

x = -21/31 // + -21/31

x-(-21/31) = 0

x+21/31 = 0

x+21/31 = 0 // - 21/31

x = -21/31

x = -21/31

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