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z in (-oo:+oo)
-2*z-(3/2) = (8*z)/3 // - (8*z)/3
-2*z-((8*z)/3)-(3/2) = 0
(-8/3)*z-2*z-3/2 = 0
-14/3*z-3/2 = 0 // + 3/2
-14/3*z = 3/2 // : -14/3
z = 3/2/(-14/3)
z = -9/28
z = -9/28
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