Question

need help solving this logarithmic
e^4x-5-7=11243

Answer 1

What you want to do is to isolate the exponential variable, here I'll show you the process\[e^{4x}-5-7=11243
\\e^{4x}-12=11243
\\e^{4x}=11243+12
\\e^{4x}=11255
\]As you can see here, we get e to the something is equal to 11255, we can also say that the natural logarithm of 11255 is equal to that something
\(\ln(11255)=4x\)
And voila.