TeX source:

\begin{aligned} y &=\dfrac{2}{x-3}+4 & & \text { Set up an equation. } \\ y-4 &=\dfrac{2}{x-3} & & \text { Subtract } 4 \text { from both sides. } \\x-3 &=\dfrac{2}{y-4} & & \text { Multiply both sides by } x-3 \text { and divide by } y-4. \\ x &=\dfrac{2}{y-4}+3 & & \text { Add } 3 \text { to both sides. } \end{aligned}