1/7+x=2/3 (1/7+x=2/3( )

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1/7+x=2/3 (1/7+x=2/3( )
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1/7+x=2/3 (1/7+x=2/3( )
1/7+x=2/3 (
1/7+x=2/3

1/7+x=2/3 (1/7+x=2/3( )