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(x+1+1/4x):(x-1/4x)=[(4x²+4x+1)/4x]:[(4x²-1)/4x]=[(2x+1)²/4x] :[(2x+1)*(2x-1)/4x]=
=(2x+1)/(2x-1)
x=11,5
(2*11,5+1)/(2*11,5-1)=24/22=12/11
(4x-1)(3-2x)+8x^2=10x
12x-8x^2-3+2x+8x^2=10x
14x-3=10x
14x-10x=3
4x=3
x=3/4