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  <title>Highlighted Variable Example</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7;font-size:.95rem}h1{margin:0 0 .75rem;font-size:1.25rem;color:#0f172a}var.highlight{font-style:italic;color:#1e40af;background:#eff6ff;padding:.1rem .35rem;border-radius:4px}</style>

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  <h1>Variable in an Equation</h1>

  <p>The value of <var class=highlight>x</var> in the equation is...</p>

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HTML var Tag — Highlighted Variable