X/(X+2000)=0.1% 谁会解这个方程?
问题描述:
X/(X+2000)=0.1% 谁会解这个方程?
答
X/(X+2000)=0.1%
x=(x+2000)*0.1%
x=0.001x+2
0.999x=2
x=2000/999