0=0.6667-0.0617-[(1+x)÷x]×4.5%×(1-30%)[(1+x)÷x]×4.5%×(1-30%)=0.6667-0.0617=0.605[(1+x)÷x]×4.5%=0.605÷0.7(1+x)÷x=0.605÷0.7÷4.5%1/X+1=0.605÷0.7÷4.5%1/X=0.605÷0.7÷4.5%-1X=1/(0.605÷0.7÷4.5%-1)
0=0.6667-0.0617-[(1+x)÷x]×4.5%×(1-30%)
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