Pammilla Pammilla
  • 15-06-2018
  • Mathematics
contestada

Twice the difference of a number and seven is equal to three times the sum of the number and seven

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altavistard
altavistard altavistard
  • 15-06-2018
2(n-7) = 3(n+7)
2n-14 = 3n + 21
   -35  = n  (answer)
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