College Math

posted by .

Could you show me how to do

5z/7 - 5z/8 = 1

The answer is 56/7
But how did they get it ?

  • College Math -

    sorry the correct answer is 56/5

  • College Math -

    40z/56 - 35z/56 = 1

    5 z/56 = 1

    z = 56/5

  • College Math -

    Thank you :)

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