(4000-x)×0.5-4x=1973
问题描述:
(4000-x)×0.5-4x=1973
答
4000-x)×0.5-4x=1973
2000-0.5x-4x=1973
2000-1973=4.5x
27=4.5x
x=27/4.5
x=6