$$-404.23x\cdot2+40.697x+0.0132 = 0$$

$$ \begin{aligned} -404.23x\cdot2+40.697x+0.0132 &= 0&& \text{simplify left side} \\[1 em]-404x\cdot2+40x+0.0132 &= 0&& \\[1 em]-404x\cdot2+40x+0.0132 &= 0&& \\[1 em]-808x+40x+0 &= 0&& \\[1 em]-808x+40x+0 &= 0&& \\[1 em]-768x &= 0&& \text{ divide both sides by $ -768 $ } \\[1 em]x &= \frac{0}{-768}&& \\[1 em]x &= 0&& \\[1 em] \end{aligned} $$

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