$$ \begin{aligned} 24 &= 3(4x-8)&& \text{simplify right side} \\[1 em]24 &= 12x-24&& \text{ swap the left and right side of the equation } \\[1 em]12x-24 &= 24&& \text{ move -24 to the right } \\[1 em]12x &= 24+24&& \\[1 em]12x &= 48&& \text{ divide both sides by $ 12 $ } \\[1 em]x &= \frac{48}{12}&& \\[1 em]x &= 4&& \\[1 em] \end{aligned} $$

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