符号清晰.(x为未知数,*为乘号,1/9就是九分之一),求X.(x-1)*1/9+1={x-[(x-1)*1/9+1]-2}*1/9+2求解,
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![符号清晰.(x为未知数,*为乘号,1/9就是九分之一),求X.(x-1)*1/9+1={x-[(x-1)*1/9+1]-2}*1/9+2求解,](/uploads/image/z/1636432-16-2.jpg?t=%E7%AC%A6%E5%8F%B7%E6%B8%85%E6%99%B0.%EF%BC%88x%E4%B8%BA%E6%9C%AA%E7%9F%A5%E6%95%B0%2C%2A%E4%B8%BA%E4%B9%98%E5%8F%B7%2C1%2F9%E5%B0%B1%E6%98%AF%E4%B9%9D%E5%88%86%E4%B9%8B%E4%B8%80%EF%BC%89%2C%E6%B1%82X.%28x-1%29%2A1%2F9%2B1%3D%7Bx-%5B%28x-1%29%2A1%2F9%2B1%5D-2%7D%2A1%2F9%2B2%E6%B1%82%E8%A7%A3%2C)
符号清晰.(x为未知数,*为乘号,1/9就是九分之一),求X.(x-1)*1/9+1={x-[(x-1)*1/9+1]-2}*1/9+2求解,
符号清晰.(x为未知数,*为乘号,1/9就是九分之一),求X.
(x-1)*1/9+1={x-[(x-1)*1/9+1]-2}*1/9+2求解,
符号清晰.(x为未知数,*为乘号,1/9就是九分之一),求X.(x-1)*1/9+1={x-[(x-1)*1/9+1]-2}*1/9+2求解,
(x-1)*1/9+1={x-[(x-1)*1/9+1]-2}*1/9+2
x/9-1/9+1=[x-(x/9-1/9+1)-2]*1/9+2
x/9+8/9=(8x/9-8/9-2)*1/9+2
两边乘9
x+8=8x/9-26/9+18
x-8x/9=18-8-26/9
x/9=64/9
x=64
x=64
我解出来了,写在纸上,给邮箱发过来给你
直接展开1/9x-1/9 1=[x-(1/9x-1/9 1)-2]*1/9 2
1/9x-1/9=(8/9x-8/9-2)*1/9 1
1/9*(1/9x 26/9)=10/9
1/9x=64/9
x=64
这道题注意可以用简便方法
(x-1)*1/9={x-[(x-1)*1/9+1]-2}*1/9+1 把右侧的1当做9/9想办法整理到括号里
(x-1)*1/9={x-[(x-1)*1/9+1]-2+9}*1/9 同时去掉括号两侧的1/9
x-1=x+7-[(x-1)*1/9+1]合并同类项得
( x-1)*1/9=7去括号得
x=64