Y(4x-1)=-40
y=-40/(4x-1)
5x-4x(-40/(4x-1))=27|(4x-1)
4x-1не =0
4x не =1
x не =0,25
5x(4x-1)+160x=27(4x-1)
20x^2-5x+160x-108x+27=0
20x^2+47x+27=0
D=47^2-4*20*27=2209-2160=49=7^2
x1=(-47+7)/2*20=-40/40
x1=-1
x2=(-47-7)/40=-54/40
x2=-1,35
y1=-40/(4x1-1)=-40/(4*(-1)-1)=-40/(-5)
y1=8
y2=-40/(4x2-1)=-40/(4*(-1,35)-1)=-40/(-6,4)
y2=6,25