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x in (-oo:+oo)
(2*x-4)/6 = (4*x+8)/8 // - (4*x+8)/8
(2*x-4)/6-((4*x+8)/8) = 0
(2*x-4)/6+(-1*(4*x+8))/8 = 0
(8*(2*x-4))/(6*8)+(-1*6*(4*x+8))/(6*8) = 0
8*(2*x-4)-1*6*(4*x+8) = 0
-8*x-80 = 0
(-8*x-80)/(6*8) = 0
(-8*x-80)/(6*8) = 0 // * 6*8
-8*x-80 = 0
-8*x-80 = 0 // + 80
-8*x = 80 // : -8
x = 80/(-8)
x = -10
x = -10
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