$$ \begin{aligned} 7776 &= \frac{4}{3}x&& \text{multiply ALL terms by } \color{blue}{ 3 }. \\[1 em]3\cdot7776 &= 3 \cdot \frac{4}{3}x&& \text{cancel out the denominators} \\[1 em]23328 &= 4x&& \text{ swap the left and right side of the equation } \\[1 em]4x &= 23328&& \text{ divide both sides by $ 4 $ } \\[1 em]x &= \frac{23328}{4}&& \\[1 em]x &= 5832&& \\[1 em] \end{aligned} $$

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