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