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z in (-oo:+oo)
(-1/6)*(z+6) = (4/5)*(z-(3/8)) // - (4/5)*(z-(3/8))
(-1/6)*(z+6)-((4/5)*(z-(3/8))) = 0
(-1/6)*(z+6)+(-4/5)*(z-3/8) = 0
-1/6*(z+6)-4/5*(z-3/8) = 0
-1/6*(z+6)-4/5*(z-3/8) = 0
-29/30*z-7/10 = 0
-29/30*z-7/10 = 0
-29/30*z-7/10 = 0 // + 7/10
-29/30*z = 7/10 // : -29/30
z = 7/10/(-29/30)
z = -21/29
z = -21/29
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