Question
$$(252-25)e\cdot(-2)\cdot4+1 = 0$$
Answer
$$ e = \dfrac{1}{1816} $$
Explanation
$$ \begin{aligned} (252-25)e\cdot(-2)\cdot4+1 &= 0&& \text{simplify left side} \\[1 em]227e\cdot(-2)\cdot4+1 &= 0&& \\[1 em]-1816e+1 &= 0&& \text{ move the constants to the right } \\[1 em]-1816e &= -1&& \text{ divide both sides by $ -1816 $ } \\[1 em]e &= \frac{-1}{-1816}&& \\[1 em]e &= \frac{1}{1816}&& \\[1 em] \end{aligned} $$
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