Question
$$3(-4x-5)+5x+4 = -4$$
Answer
$$ x = -1 $$
Explanation
$$ \begin{aligned} 3(-4x-5)+5x+4 &= -4&& \text{simplify left side} \\[1 em]-12x-15+5x+4 &= -4&& \\[1 em]-7x-11 &= -4&& \text{ move -11 to the right } \\[1 em]-7x &= -4+11&& \\[1 em]-7x &= 7&& \text{ divide both sides by $ -7 $ } \\[1 em]x &= -\frac{7}{7}&& \\[1 em]x &= -1&& \\[1 em] \end{aligned} $$
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