-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

-(z/2)-7-1 = 0

-1/2*z-8 = 0 // + 8

-1/2*z = 8 // : -1/2

z = 8/(-1/2)

z = -16

z = -16

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