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z in (-oo:+oo)
2-(8*z)-6 = z+10/3 // - z+10/3
2-(8*z)-z-(10/3)-6 = 0
2-8*z-z-10/3-6 = 0
-9*z-22/3 = 0 // + 22/3
-9*z = 22/3 // : -9
z = 22/3/(-9)
z = -22/27
z = -22/27
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