Question

how do you solve In(4x)=3 when you don't know what x is?

Answer 1

you know that \[ln(x)=y\] means \[e^y=x\]
so\[ ln(4x)=3\]
means
\[e^3=4x\]
\[x=\frac{e^3}{4}\]

Answer 2

but is that your answer. or do you have to solve e^3/4?

Answer 3

that is the answer unless you want a decimal approximation. if so use a calculator to get
\[\frac{e^3}{4}=5.021\]

Answer 4

okay. thats what i got. :)