6×2.88%x=（16000-x）6.21%×8×50%∵6*2.88%=0.17286.21%×8×50%=0.2484∴原式化简为0.1728x=(16000-x)0.24840.1728x=16000*0.2484-0.2484x(0.2484+0.1728)x=16000*0.24840.4212x=3.9744x=9.4359