z/2-z=1 - solution

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Solution for z/2-z=1 equation:

z in (-oo:+oo)

z/2-z = 1 // - 1

z/2-z-1 = 0

-1/2*z-1 = 0 // + 1

-1/2*z = 1 // : -1/2

z = 1/(-1/2)

z = -2

z = -2

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