1)3 1/2 - 1/2 . x= 2/3 2) 1/4 + 1/3 : (2x -1)= -1 giúp tuii

1)3 1/2 - 1/2 . x= 2/3 2) 1/4 + 1/3 : (2x -1)= -1 giúp tuii
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