z/2-z=2

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Solution for z/2-z=2 equation: 


z in (-oo:+oo)

z/2-z = 2 // - 2

z/2-z-2 = 0

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

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

z = 2/(-1/2)

z = -4

z = -4

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