zapora12 zapora12
  • 13-09-2015
  • Mathematics
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what is the fraction for 4(5n-7)=10n+2

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Panoyin
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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