Question

解一个很长的方程1.98%x+x=(1000-x)+12×0.00215×(1000-x)-20%×(1000-x)只求

Answer 1

0..0198x+x=(1000-x)(1+12*0.000215-0.2)=(1000-x)*0.80258.

0.0198x+x+0.80258x=1000*0.80258.

1.82238x=802.58

x=802.58/1.82238=440.3997

x≈440.4.