解方程:X*(1+40%)*80% - X=2700/10
问题描述:
解方程:X*(1+40%)*80% - X=2700/10
答
X*(1+40%)*80% - X=2700/10
1.4x×0.8-x=270
1.12x-x=270
0.12x=270
x=2250