Mathematics
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    7000+7000×75%(x-1)<7000×80%x
    7000+7000×0.75x<7000×80%x
    x^20<1.001^x x>200
    x^20<1.001^x
    sqrt(x^2-6x+5)≥x-2
    0<5x+15-7(x-1)<3
    3x+1/x-1<2
    2x <150-5x<2.5x
    2x<150-5x,2.5x
    2x-1.5(x+2)>-4-1.5(x+4-2)
    sinx = 2*sin(3*x-30) x>0 x<360
    25+25>49
    25+3<40
    x²-8x+16≥0
    -5
    
-5
    
3>3x-6
    3x^2+10x-8>=0
    3x^2+10x-8>=0
    x(x-2)<0

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