kangogauri kangogauri

01-04-2015
Mathematics

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2[tex] 3^(x+7) = 9^(x-1)[/tex]

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Panoyin Panoyin

03-04-2015

3(x + 7) = 9(x - 1)
3(x) + 3(7) = 9(x) - 9(1)
3x + 21 = 9x - 9
- 3x     - 3x
      21 = 3x - 9
      + 9    + 9
   30 = 3x
      3 3
   10 = x

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