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X in (-oo:+oo)
(2*X-4)/5 = (4*X+1)/8 // - (4*X+1)/8
(2*X-4)/5-((4*X+1)/8) = 0
(2*X-4)/5+(-1*(4*X+1))/8 = 0
(8*(2*X-4))/(5*8)+(-1*5*(4*X+1))/(5*8) = 0
8*(2*X-4)-1*5*(4*X+1) = 0
-4*X-37 = 0
(-4*X-37)/(5*8) = 0
(-4*X-37)/(5*8) = 0 // * 5*8
-4*X-37 = 0
-4*X-37 = 0 // + 37
-4*X = 37 // : -4
X = 37/(-4)
X = -37/4
X = -37/4
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