24-03-2015
Mathematics

Answered

can you help me ? 20^n-2+6.5=87

Verified Answer :

Panoyin Panoyin

24-03-2015

20n - 2 + 6.5 = 87
20n + 4.5 = 87
   -4.5 -4.5
   20n = 82.5
      20    20
   n = 4.125
or
20^n - 2 + 6.5 = 87
20^n + 4.5 = 87
   -4.5    -4.5
   20^n = 82.5
   n ≈ 1.037

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