18*2/5x+(18-10)*(1-2/5)x=3000
问题描述:
18*2/5x+(18-10)*(1-2/5)x=3000
答
x=3000/13
答
18*2/5x+(18-10)*(1-2/5)x=3000
5.2X+8*3/5X=3000
5.2X+4.8X=3000
10X=3000
X=300
答
X=250