11074.15=（220*63-x）*0.95+8*63
    （26.307+x）×0.85＝52.613+67.72-x
    （26.307+x）×0.85＝52.613+68.72-x
    （26.307+x）×0.85＝52.613+69.72-x
    （26.307+x）×0.85＝52.613+70.72-x
    （26.307+x）×0.85＝52.613+71.72-x
    （26.307+x）×0.85＝52.613+72.72-x
    11169.15=（220*63-x）*0.95+63*8
    （8-2x）^2+（9-2x）^2＝4x^2
    x＋x²＝36
    x∧3＝6×x＋7
    791-x+(480-x)*2/3=1010
    0.42=-2×(x-0.5)²+0.5
    x/1.2+2=x+3/1.25
    x+55=x*6
    x-1.8-5.4=0.4x
    3^x=x^9
    （9/600）x^3-3x^2+150x=0
    x*99.975%-128.123*100.025%=2/10
    x*99.975%-128.123*100.025%=1/10

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