Question
$$x+\frac{51}{2}x = 168$$
Answer
$$ x = \dfrac{336}{53} $$
Explanation
$$ \begin{aligned} x+\frac{51}{2}x &= 168&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2x+2 \cdot \frac{51}{2}x &= 2\cdot168&& \text{cancel out the denominators} \\[1 em]2x+51x &= 336&& \text{simplify left side} \\[1 em]53x &= 336&& \text{ divide both sides by $ 53 $ } \\[1 em]x &= \frac{336}{53}&& \\[1 em] \end{aligned} $$
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