(4000-x)×0.5-4x=1973

问题描述:

(4000-x)×0.5-4x=1973

4000-x)×0.5-4x=1973
2000-0.5x-4x=1973
2000-1973=4.5x
27=4.5x
x=27/4.5
x=6