$$ \begin{aligned} 545-6x &= 80+17x&& \text{move the $ \color{blue}{ 17x } $ to the left side and $ \color{blue}{ 545 }$ to the right} \\[1 em]-6x-17x &= 80-545&& \text{simplify left and right hand side} \\[1 em]-23x &= -465&& \text{ divide both sides by $ -23 $ } \\[1 em]x &= \frac{-465}{-23}&& \\[1 em]x &= \frac{465}{23}&& \\[1 em] \end{aligned} $$

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