Question
$$\frac{1}{2}x+9 = 14$$
Answer
$$ x = 10 $$
Explanation
$$ \begin{aligned} \frac{1}{2}x+9 &= 14&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2 \cdot \frac{1}{2}x+2\cdot9 &= 2\cdot14&& \text{cancel out the denominators} \\[1 em]x+18 &= 28&& \text{ move 18 to the right } \\[1 em]x &= 28-18&& \\[1 em]x &= 10&& \\[1 em]x &= 10&& \\[1 em] \end{aligned} $$
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