$$ \begin{aligned} 3x-23(x-1) &= 0&& \text{simplify left side} \\[1 em]3x-(23x-23) &= 0&& \\[1 em]3x-23x+23 &= 0&& \\[1 em]-20x+23 &= 0&& \text{ move the constants to the right } \\[1 em]-20x &= -23&& \text{ divide both sides by $ -20 $ } \\[1 em]x &= \frac{-23}{-20}&& \\[1 em]x &= \frac{23}{20}&& \\[1 em] \end{aligned} $$
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