600-7200:(х+34)=520

600-7200:(х+34)=520

  • 7200:(Х+34)=600-5207200:(x+34)=80(Х+34)=7200:80(Х+34)=90Х=90-34Х=56
  • 7200(х+34)=600-520
    7200(х+34)=80
    х+34=720080
    х+34=90
    х=90-34
    х=56

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