$$ \begin{aligned} 6x-2(3x-30) &= 5(x-12)&& \text{simplify left and right hand side} \\[1 em]6x-(6x-60) &= 5x-60&& \\[1 em]6x-6x+60 &= 5x-60&& \\[1 em]6x-6x+60 &= 5x-60&& \\[1 em]60 &= 5x-60&& \text{ swap the left and right side of the equation } \\[1 em]5x-60 &= 60&& \text{ move -60 to the right } \\[1 em]5x &= 60+60&& \\[1 em]5x &= 120&& \text{ divide both sides by $ 5 $ } \\[1 em]x &= \frac{120}{5}&& \\[1 em]x &= 24&& \\[1 em] \end{aligned} $$

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