54×7.98+76.6x=130.6×7.96
    12.7a=250000 9.3%b=
    x^7
    88x^36+100x^35+100x^34+100x^33+100x^32= 3542.35
    88x^30+100x^29+100x^28+100x^27+100x^26= 2505.6
    88x^25+100x^24+100x^23+100x^22+100x^21= 1801.95
    88x^20+100x^19+100x^18+100x^17+100x^16 = 1281.95
    88x^15+100x^14+100x^13+100x^12+100x^11=857.4
    88x^10+100x^9+100x^8+100x^7+100x^6 =584.05
    36.5x/7.95-36.5=19.14
    36.5x/7.95-36.5=19.14
    36.5x/7.95-36.5=19.14
    36.5x/7.95-36.5=19.14
    36.5x/7.95-36.5=19.14
    36.5x/7.95-36.5=19.14
    36.5x/7.95-36.5=19.3
    x-lnx＝2
    12.14x=7.98×（x+3.7）
    2/3x-2=4/3(5/3x-2)^2-8/3(5/3x-2)-4
    (1-x)x=0.115

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