<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\small
\begin{align}
f(x) &amp;= \begin{cases}
    120 &amp; x \leq 150, \\
    20 + ((120-20) * ((210 - x) / (210-150))) &amp; 150 &lt; x \leq 210, \\
    20 &amp; \text{otherwise}.
  \end{cases}
\end{align}
\normalsize
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