$$ \begin{aligned} 144x+144 &= 288x-288&& \text{move the $ \color{blue}{ 288x } $ to the left side and $ \color{blue}{ 144 }$ to the right} \\[1 em]144x-288x &= -288-144&& \text{simplify left and right hand side} \\[1 em]-144x &= -432&& \text{ divide both sides by $ -144 $ } \\[1 em]x &= \frac{-432}{-144}&& \\[1 em]x &= 3&& \\[1 em] \end{aligned} $$

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