57/11+(х - 9/11 ) = 18/11
х - 9/11 = 18/11- 57/11
х - 9/11 =- 39/11
х = 9/11 -39/11
х =-30/11
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57/11+(х - 9/11 ) = 18/11
х - 9/11 = 18/11- 57/11
х - 9/11 =- 39/11
х = 9/11 -39/11
х =-30/11