解方程 x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9解方程x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9 )

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解方程 x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9解方程x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9 )

解方程 x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9解方程x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9 )
解方程 x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9
解方程
x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9 )

解方程 x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9解方程x - 1/3 [ x - 1/3 ( x - 9 ) ] = 1/9 ( x - 9 )
去中括号,得 x-1/3x+1/9(x-9)=1/9(x-9)
x-1/3x=0
x=0