$$6x-(-8x+5)+3 = -9$$
Answer
$$ x = -\frac{1}{2} $$
Explanation
$$ \begin{aligned} 6x-(-8x+5)+3 &= -9&& \text{simplify left side} \\[1 em]6x+8x-5+3 &= -9&& \\[1 em]14x-2 &= -9&& \text{ move -2 to the right } \\[1 em]14x &= -9+2&& \\[1 em]14x &= -7&& \text{ divide both sides by $ 14 $ } \\[1 em]x &= -\frac{7}{14}&& \\[1 em]x &= -\frac{1}{2}&& \\[1 em] \end{aligned} $$
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