SOLUTION: 3(5^-x/4) = 15 a.-4 b.4 c.-1/3 d.1/3 Help, please? Show all steps.

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Question 399957: 3(5^-x/4) = 15
a.-4
b.4
c.-1/3
d.1/3
Help, please? Show all steps.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

3(5^-x/4) = 15

  5^-x/4 = 5

  5^-x/4 = 5^1

   -x/4 = 1

    x = -4