Question
$$-16 = -\frac{b}{2}$$
Answer
$$ b = 32 $$
Explanation
$$ \begin{aligned} -16 &= -\frac{b}{2}&& \text{multiply ALL terms by } \color{blue}{ 2 }. \\[1 em]2\cdot(-16) &= -2 \cdot \frac{b}{2}&& \text{cancel out the denominators} \\[1 em]-32 &= -b&& \text{ swap the left and right side of the equation } \\[1 em]-b &= -32&& \text{switch signs on both sides} \\[1 em]b &= 32&& \\[1 em] \end{aligned} $$
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