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Assuming your equation is: e^4x = 2981
Then taking the logs to base e (natural logs) of both sides gives:
ln(e^4x) = ln(2981)
→ 4x = ln(2981)
[Note: The 2981 looks like it has been rounded to a whole number from approx 2980.958 which means the value of x was a whole number (to which ln(2981) rounds).]
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