$$ \begin{aligned} 8 &= 8x-4(x+8)&& \text{simplify right side} \\[1 em]8 &= 8x-(4x+32)&& \\[1 em]8 &= 8x-4x-32&& \\[1 em]8 &= 4x-32&& \text{ swap the left and right side of the equation } \\[1 em]4x-32 &= 8&& \text{ move -32 to the right } \\[1 em]4x &= 8+32&& \\[1 em]4x &= 40&& \text{ divide both sides by $ 4 $ } \\[1 em]x &= \frac{40}{4}&& \\[1 em]x &= 10&& \\[1 em] \end{aligned} $$

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