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z in (-oo:+oo)
3 = z/9.2 // - z/9.2
3-(z/9.2) = 0
3-0.10869565*z = 0
3-0.10869565*z = 0 // - 3
-0.10869565*z = -3 // : -0.10869565
z = -3/(-0.10869565)
z = 27.60000055
z = 27.60000055
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