tan x ＝0.5
    1000+0.05x=0.2x
    5000+0.25xx=x
    10x-x=288
    22x+30（1/2x+15）=6000
    X÷2=3.6
    x÷2=3.6
    x/11.3+x=23.4
    x/11.3+x=24.5
    (16x)²+(9x)²=3716.1216
    16x²+9x²=3716.1216
    16x²+9x²=3716.1216
    16x^2+9x^2=3716.1216
    (16x)²+(9x)²=3716.1216
    (210/136)x+51=52.5x
    27a^2-(a+1)^2(8a-1)
    27a^2-(a+1)^2(8a-1)
    27a^2-(a+1)^2(8a-1)=0
    abs(2x-4)=abs[(8-4x)/(4x+2)+2x]
    4x∧2-16x+16=(4x∧2+16-16x∧2)/(4x∧2+1+4x)+4x∧2+(16x-8x∧2)/(2x+1)

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