1-z/2=-8 - solution

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Solution for 1-z/2=-8 equation:

z in (-oo:+oo)

1-(z/2) = -8 // + 8

1-(z/2)+8 = 0

9-1/2*z = 0 // - 9

-1/2*z = -9 // : -1/2

z = -9/(-1/2)

z = 18

z = 18

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