Question 454991
Solve logarithmic equation log(3x+15)=2 and write 5 lnx + 1/2 lny - 4 lnz as a single logarithm. 
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log(3x+15)=2
(3x+15)= 10^2
3x+15= 100
3x = 85
x = 85/3 (exact answer)
x = 28.33 (approx decimal answer)
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5 lnx + 1/2 lny - 4 lnz
lnx^5 + lny^(1/2) - lnz^4
ln x^5y^(1/2) - lnz^4
ln x^5y^(1/2)/z^4