20brahim 20brahim
  • 08-05-2022
  • Mathematics
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I don't know the answer...

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consumed44
consumed44 consumed44
  • 08-05-2022

Answer:  the number's I used were 30, 20, 40

1. 2n-1=39  = 2(20)-1=39 = 40-1=39

2. 2n-60=20 = 2(40)-60=20 = 80-60=20

3. 2n-20=40 = 2(30)-10=40 = 60-20=40

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