$$3x+11 = 0$$
Answer
$$ x = -\frac{11}{3} $$
Explanation
$$ \begin{aligned} 3x+11 &= 0&& \text{ move the constants to the right } \\[1 em]3x &= -11&& \text{ divide both sides by $ 3 $ } \\[1 em]x &= -\frac{11}{3}&& \\[1 em] \end{aligned} $$
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