Respuesta :
Answer:
x = 2.5
Step-by-step explanation:
2+3log(4x)=5
Subtract 2 from each side
2-2+3log(4x)=5-2
3log (4x) = 3
Divide by 3
3/3 log (4x) = 3/3
log (4x) =1
Raise each side to the power of 10 (The implied base on the log is 10)
10^ log (4x) = 10 ^1
4x = 10
Divide each side by 4
4x/4 =10/4
x = 2.5
Answer:
[tex]\large\boxed{x=\dfrac{5}{2}=2\dfrac{1}{2}}[/tex]
Step-by-step explanation:
[tex]Domain:\ 4x>0\to x>0\\\\Use:\ \log_ab=c\iff a^c=b\ for\ a>0\ \wedge\ a\neq1\ \wedge\ b>0\\\\\log(x)=\log_{10}(x)\\=============================\\\\2+3\log(4x)=5\qquad\text{subtract 2 from both sides}\\\\3\log(4x)=3\qquad\text{divide both sides by 3}\\\\\log(4x)=1\iff4x=10^1\\\\4x=10\qquad\text{divide both sides by 4}\\\\x=\dfrac{10}{4}\\\\x=\dfrac{10:2}{4:2}\\\\x=\dfrac{5}{2}\\\\x=2\dfrac{1}{2}\in D[/tex]