X/72*40-X/72*32=80
来源:百度知道 编辑:UC知道 时间:2024/05/29 19:06:47
来个人帮我解一下谢谢
X/72*40-X/72*32=80
(X/72)*(40-32)=80
X/72*8=80
X/72=80÷8=10
X=72*10
X=720
(X/72)*8=80
X=720
x/72(1/40-1/32)=80
x/9(1/5-1/4)=640
x/9(-1/20)=640
x=-115200
X/72*(40-32)=80》X=7.2
不明白题!
1.X/(72*40)-X/(72*32)=80
(1/8-1)*[X/(72*32)]=80
X=-7/(8*72*32*80)
2.(X/72)*40 - (X/72)*32=80
(X/72)*(40-32)=80
X=720