$$ \begin{aligned} \frac{33}{4}x &= 3&& \text{multiply ALL terms by } \color{blue}{ 4 }. \\[1 em]4 \cdot \frac{33}{4}x &= 4\cdot3&& \text{cancel out the denominators} \\[1 em]33x &= 12&& \text{ divide both sides by $ 33 $ } \\[1 em]x &= \frac{12}{33}&& \\[1 em]x &= \frac{4}{11}&& \\[1 em] \end{aligned} $$
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