8.4x-x= 0.12

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8.4x-x= 0.12

8.4x-x=0.12
7.4x=0.12
x=0.01621621621621621621621621621622
162 是无限循环.

8.4x-x=0.12
7.4x=0.12
x=0.01621621621621621621621621621622

j8.4x-x= 0.12
(8.4-1)x=0.12
7.4x=0.12
x=0.0162

8.4x-x= 0.12
7.4x=0.12
x=0.0162