-1=z/-2 - solution

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Solution for -1=z/-2 equation:

z in (-oo:+oo)

-1 = z/(-2) // - z/(-2)

-(z/(-2))-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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