$$ \begin{aligned} 16x-56 &= 2x&& \text{move the $ \color{blue}{ 2x } $ to the left side and $ \color{blue}{ -56 }$ to the right} \\[1 em]16x-2x &= 56&& \text{simplify left side} \\[1 em]14x &= 56&& \text{ divide both sides by $ 14 $ } \\[1 em]x &= \frac{56}{14}&& \\[1 em]x &= 4&& \\[1 em] \end{aligned} $$
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