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13-09-2015
Mathematics

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what is the fraction for 4(5n-7)=10n+2

Respuesta :

Panoyin Panoyin

14-09-2015

    4(5n - 7) = 10n + 2
4(5n) - 4(7) = 10n + 2
   20n - 28 = 10n + 2
   - 10n    - 10n
   10n - 28 = 2
   + 28 + 28
      10n = 30
   10    10
      n = 3

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