bron5iulilovemeena bron5iulilovemeena
  • 16-03-2017
  • Mathematics
contestada

The sum of the reciprocal of a number and the reciprocal of 2 less than the number is 7 times the reciprocal of the original number. find the original number.

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irspow
irspow irspow
  • 21-03-2017
1/n+1/(n-2)=7/n

1/(n-2)=7/n-1/n

1/(n-2)=6/n

n=6(n-2)

n=6n-12

5n=12

n=12/5
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