(1-40%)x-(1-40%)x×(1-20%)=60
问题描述:
(1-40%)x-(1-40%)x×(1-20%)=60
答
1-40%)x-(1-40%)x×(1-20%)=60
(1-40%)x×0.2=60
0.6×0.2x=60
x=500
答
(1-40%)x-(1-40%)xx(1-20%)=60
(1-40%)x20%x=60
60%x20%x=60
x=500