问题已解决
老師請問18%+13%?(1-x)=16%怎么解方程?求過程



你好
18%+13%?(1-x)=16%
移項可得,13%?(1-x)=16%—18%=—2%
再把13%移項到右邊,就是1—x=—2%/13%
然后移項可得,x=1+2%/13%
2021 11/30 15:40

84784991 

2021 11/30 18:16
但得數(shù)是60%

鄒老師 

2021 11/30 18:28
你好,能提供一下解析過程嗎?
得數(shù)是60%,代入進去??18%+13%?(1—x)=16%,顯然不符合這個等式關(guān)系啊

84784991 

2021 11/30 19:11
老師,是這題
FAILED

鄒老師 

2021 11/30 19:13
你好,請看你初始描述,以及提供的解析的圖片。
是你把18%后面的X給遺漏了,導致我這邊計算結(jié)果與你解析不一致
FAILED
FAILED

84784991 

2021 11/30 19:36
是的,所以想問老師60%從哪計算解出來的

鄒老師 

2021 11/30 19:40
你好
18%X+13%?(1—X)=16%
展開就是 ,18%X+13%—13%X=16%
移項可得,18%X—13%X=16%—13%
X*(18%—13%)=16%—13%
解得?X=(16%—13%)/(18%—13%)=0.6=60%
