(1-2x)^2>4x-3
(7x+2)/10-(8x+1)/15<=1/3
4x^2+1<=4x
Всё это в системе.
1-4x+4x^2-4x+3>0
3(7x+2)-2(8x+1)<=10
4x^2-4x+1<=0
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x^2-2x+1>0
21x+6-16x-2<=10
(2x-1)^2 <=0
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(x-1)^2>0
5x<=6
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x<>1
x<=6/5
2x-1=0
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x=1/2
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1/2 1 6/5
Ответ х=1/2