x÷(608－x)=18
    0.4（10+x）=0.2（8+2x）
    x∧2（1+1/（x∧2））∧（3/2）
    x∧5+4×x∧4+7×x∧3+5×x∧2+3×x+1=0
    x+(360-x)=360
    5x²+5x-16＝0
    X/6-x/8等于2
    X/6-x/8
    (x-x/1.09*0.03)*0.02=3297270.8
    xxx-9xx+18x-1=0
    (x-x/1.09*0.03)*0.02=3297270.83
    ln（x+1)=3
    x^2+x=930
    （X+9）/(X+100)=0.35
    （X+8）/(X+100)=0.35
    （X+7）/(X+100)=0.35
    （X+6）/(X+100)=0.35
    （X+5）/(X+100)=0.35
    （X+20）/(X+100)=0.35
    （X+10）/(X+100)=0.35

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