Functions, graphs and inverses practice question 4

The left side is a difference of two logarithms. Which law combines them into one, and what undoes a natural logarithm?

Here $\log$ is the natural logarithm, base $e$. Combine the left side into one logarithm with $\log A - \log B = \log\dfrac{A}{B}$.

$\log u = 1$ means $u = e^{1} = e$. Solve $\dfrac{x + 1}{x} = e$ for $x$, and check that $x > 0$.