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z in (-oo:+oo)
10/4 = (z-8)/16 // - (z-8)/16
10/4-((z-8)/16) = 0
(-1*(z-8))/16+5/2 = 0
(-1*2*(z-8))/(2*16)+(5*16)/(2*16) = 0
5*16-1*2*(z-8) = 0
96-2*z = 0
(96-2*z)/(2*16) = 0
(96-2*z)/(2*16) = 0 // * 2*16
96-2*z = 0
96-2*z = 0 // - 96
-2*z = -96 // : -2
z = -96/(-2)
z = 48
z = 48
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