$$ \begin{aligned} 8+6x-1 &= 3+8x&& \text{simplify left and right hand side} \\[1 em]6x+7 &= 8x+3&& \text{move the $ \color{blue}{ 8x } $ to the left side and $ \color{blue}{ 7 }$ to the right} \\[1 em]6x-8x &= 3-7&& \text{simplify left and right hand side} \\[1 em]-2x &= -4&& \text{ divide both sides by $ -2 $ } \\[1 em]x &= \frac{-4}{-2}&& \\[1 em]x &= 2&& \\[1 em] \end{aligned} $$

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