Question
$$3(-3x-4)+3x-1 = -1$$
Answer
$$ x = -2 $$
Explanation
$$ \begin{aligned} 3(-3x-4)+3x-1 &= -1&& \text{simplify left side} \\[1 em]-9x-12+3x-1 &= -1&& \\[1 em]-6x-13 &= -1&& \text{ move -13 to the right } \\[1 em]-6x &= -1+13&& \\[1 em]-6x &= 12&& \text{ divide both sides by $ -6 $ } \\[1 em]x &= -\frac{12}{6}&& \\[1 em]x &= -2&& \\[1 em] \end{aligned} $$
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