Question
$$5+8x\cdot(3+2)+9-1 = 0$$
Answer
$$ x = -\dfrac{13}{40} $$
Explanation
$$ \begin{aligned} 5+8x\cdot(3+2)+9-1 &= 0&& \text{simplify left side} \\[1 em]5+8x\cdot5+9-1 &= 0&& \\[1 em]5+40x+9-1 &= 0&& \\[1 em]40x+13 &= 0&& \text{ move the constants to the right } \\[1 em]40x &= -13&& \text{ divide both sides by $ 40 $ } \\[1 em]x &= -\frac{13}{40}&& \\[1 em] \end{aligned} $$
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