$$ \begin{aligned} -8 &= 1+3(x-3)&& \text{simplify right side} \\[1 em]-8 &= 1+3x-9&& \\[1 em]-8 &= 3x-8&& \text{ swap the left and right side of the equation } \\[1 em]3x-8 &= -8&& \text{ move -8 to the right } \\[1 em]3x &= -8+8&& \\[1 em]3x &= 0&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= \frac{0}{3}&& \\[1 em]x &= 0&& \\[1 em] \end{aligned} $$

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