化简 80%*1.4%x+80%*3.7%(200000-x)=5000
问题描述：
化简 80%*1.4%x+80%*3.7%(200000-x)=5000
答
0.8*0.014X+0.8*0.037(200000-X)=5000
0.8*[0.014X+0.037(200000-X)]=5000
0.8*(0.014X+7400-0.037X)=5000
0.8*(-0.023X+7400)=5000
-0.0184X+5920=5000
-0.0184X=-920
X=50000