-7=z/2-1

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Solution for -7=z/2-1 equation: 


z in (-oo:+oo)

-7 = z/2-1 // - z/2-1

1-(z/2)-7 = 0

-1/2*z-6 = 0 // + 6

-1/2*z = 6 // : -1/2

z = 6/(-1/2)

z = -12

z = -12

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