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x in (-oo:+oo)
(1-(2*x))/8 = 7/4 // - 7/4
(1-(2*x))/8-(7/4) = 0
(1-2*x)/8-7/4 = 0
(4*(1-2*x))/(4*8)+(-7*8)/(4*8) = 0
4*(1-2*x)-7*8 = 0
-8*x-52 = 0
(-8*x-52)/(4*8) = 0
(-8*x-52)/(4*8) = 0 // * 4*8
-8*x-52 = 0
-8*x-52 = 0 // + 52
-8*x = 52 // : -8
x = 52/(-8)
x = -13/2
x = -13/2
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