( ( x * 3 + 30 ) * 0.79 + 6.99 ) * 0.94 - 9 - 2 * x >10
    ( ( x * 3 + 30 ) * 0.79 + 6.99)*0.94 - 9 - 3 * x >10
     ( x * 3 + 30 ) * 0.75 + 6.99 - 9 - 3 * x >10
    ( x * 3 + 30 ) * 0.79 + 6.99 - 9 - 3x >10
     ( x * 3 + 30 ) * 0.5 + 6.99 - 9 -x >10
     ( x * 3 + 30 ) * 0.5 + 6.99 - 9 - 2 * x >10
    ( x * 3 + 30 ) * 0.5 + 6.99 - 9 - 3*x >10
     ( x * 3 + 30 ) * 0.6 + 6.99 - 9 - x >10
    ( x * 3 + 30 ) * 0.6 + 6.99 - 9-2*x>10
    ( x * 3 + 30 ) * 0.6 + 6.99 - 9-3*x>10
    ( x * 3 + 30 ) * 0.7 - 14 + 5.99 - 1 - 3 * x>11
    ( x * 3 + 30 ) * 0.79 - 14 + 5.99 - 1 - 2 * x >11
    ( x * 3 + 30 ) * 0.79 - 14 + 5.99 - 1 - 3 * x >11
    （x*3+30）*0.7-14+5.99-1-2x>11
    （x*3+30）*0.7-14+5.99-1-3x>11
    （x*3+30）*0.7+6.99-9-2x>10
    （x*3+30）*0.7+6.99-9-3x>10
    （x*3+30）*0.7+6.99-9>10
    5x²-6x+13小于等于0
    a>a+4

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