(90-x)除以(90-x+100)=50%

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 10:02:02
(90-x)除以(90-x+100)=50%(90-x)除以(90-x+100)=50%(90-x)除以(90-x+100)=50%(90-x)除以(90-x+100)=50%90-x:90-x+10

(90-x)除以(90-x+100)=50%
(90-x)除以(90-x+100)=50%

(90-x)除以(90-x+100)=50%
(90-x)除以(90-x+100)=50%
90-x:90-x+100=50:100
100(90-x)=50(90-x+100)
x=-10
(根据比列的性质来解)(内项的积=外项的积)

-10

-10

(90-x)除以(190-x)=1/2
两边同时乘以(190-x) (90-x)=95-0.5x
-5=0.5x
x=-10