6000-6000X-(6000-6000X)X=4860
问题描述:
6000-6000X-(6000-6000X)X=4860
答
6000-6000X-(6000-6000X)X
=(6000-6000X)(1-x)
=6000(1-x)^2
=4860
所以
(1-x)^2
=0.81
所以
1-x=±0.9
所以x=0.1或x=1.9