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    A49 7
    644*x*3=2998
    x(50一2x)=150
    (2300/(2x+30))+(2300/x)=33
    2300/(2x+30)+2300/x=33
    1.08^x=3
    x=1
    50=7.17*X²÷2
    3sinx÷1+cosx=1
    0.45x-0.2=0.03
    0.45*x-0.2=0.03
    0.45*x-0.2=-0.17
    0.45*x=-0.17
    0.45*x-0.2=0.03
    (40-0.5x)(48+4x) = 512
    (40-0.5x)(48+4)=512
    x∧2-18x-27=0
    x^24-7*x^8+6=0
    40(1-x)(1-x)=32.4
    2(X-1)+7=4(X+0.5)

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