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)   (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
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