1=z/2-1 - solution

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Solution for 1=z/2-1 equation:

z in (-oo:+oo)

1 = z/2-1 // - z/2-1

1-(z/2)+1 = 0

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

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

z = -2/(-1/2)

z = 4

z = 4

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