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4^3*x-1 = (1/2)^2*x // - (1/2)^2*x
4^3*x-((1/2)^2*x)-1 = 0
255/4*x-1 = 0 // + 1
255/4*x = 1 // : 255/4
x = 1/255/4
x = 4/255
x = 4/255
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