$$x = x\cdot3+3\cdot2-10x-24$$

$$ \begin{aligned} x &= x\cdot3+3\cdot2-10x-24&& \text{simplify right side} \\[1 em]x &= 3x+6-10x-24&& \\[1 em]x &= -7x-18&& \text{move the $ \color{blue}{ -7x } $ to the left side} \\[1 em]x+7x &= -18&& \text{simplify left side} \\[1 em]8x &= -18&& \text{ divide both sides by $ 8 $ } \\[1 em]x &= -\frac{18}{8}&& \\[1 em]x &= -\frac{9}{4}&& \\[1 em] \end{aligned} $$

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