SOLUTION: Log base 4 (3x+4)^5=15

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Question 743396: Log base 4 (3x+4)^5=15
Answer by lwsshak3(11628) About Me  (Show Source):
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Log base 4 (3x+4)^5=15
Exponential form:
4^15=(3x+4)^5
raise both sides to 1/5 power
4^3=3x+4
3x+4=64
3x=60
x=20