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    4.22×5.1÷2640×x+1.65 = 1.6806
    4.22×5.1÷2640×x+1.65 = (0.16194+(1422÷2742×x-1.65)÷24.22)×42.2÷14.22
    4.22×5.1÷2640×x+1.65=(0.16806+(1422÷2742×x-1.65)÷24.22)×42.2÷14.22
    4.9989=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-1.06-9.66)/100*1/(1+0.31*1.06)+(2.86(x+0.1))/(1.36*0.101325)
    4.9989=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*0.7974*0.7527+(2.86(x+0.1))/(1.36*0.101325)
    4.1438=(30.56*0.847*(x+0.1))/(1+0.847(x+0.1))*(100-1.4-8.28)/100*1/(1+0.31*1.4)+(2.26(x+0.1))/(1.3*0.101325)
    4.1438=(30.56*0.847*(x+0.1))/(1+0.847(x+0.1))*(100-1.4%-8.28%)/100*1/(1+0.31*1.4%)+(2.26(x+0.1))/(1.3*0.101325)
    4.9989=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-9.66%-1.06%)/100*1/(1+0.31*1.06%)+(2.86(x+0.1))/(1.36*0.101325
    4.9989=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-9.66-1.06)/100*1/(1+0.31*1.06)+(2.86(x+0.1))/(1.36*0.101325)
    4.9989=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-9.66-1.06)/100*1/(1+0.31*9.66)+(2.86(x+0.1))/(1.36*0.101325)
    4.9978=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-9.66-1.06)/100*1/(1+0.31*9.66)+(2.86(x+0.1))/(1.36*0.101325)
    4.2054=(26.99*0.829*(x+0.1))/(1+0.829(x+0.1))*(100-1.06-7.84)/100*1/(1+0.31*1.06)+(2.96(x+0.1))/(1.40*0.101325)
    4.998=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-0.966-0.106)/100*1/(1+0.31*0.966)+(2.86(x+0.1))/(1.36*0.101325)
    4.998=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-9.66-1.06)/100*1/(1+0.31*9.66)+(2.86(x+0.1))/(1.36*0.101325)
    4.998=(24.1*0.449*(x+0.1))/(1+0.449(x+0.1))*(100-9.66-1.06)/100*1/(1+0.31*9.66)+(2.86(x+0.1))/(1.36*0.101325)
    3.5038+0.015*X+(32.9+X)/100*(32.9+X)*0.015+0.25*X=X
    x=(x+695926.4)/1.06*0.06*1.12
    x=(x+279774)/1.06*0.06*1.12
    s^2+10s+26=9
    90-(x+3)/4=80

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