E1.ptx

<exercise>
  <statement>
    <xsl:choose>
      <xsl:when test="prompt='system'">
        <p> Consider the system of equations</p>
        <me><xsl:value-of select="system"/></me>
        <ol>
            <li> Write an augmented matrix corresponding to this system. </li>
            <li> Write a vector equation corresponding to this system. </li>
        </ol>
      </xsl:when>
      <xsl:when test="prompt='matrix'">
        <p> Consider the augmented matrix </p>
            <me><xsl:value-of select="matrix"/></me>
         <ol>
            <li> Write a system of scalar equations corresponding to this augmented matrix. </li>
            <li> Write a vector equation corresponding to this augmented matrix. </li>
        </ol>
      </xsl:when>
      <xsl:otherwise>
        <p>Consider the vector equation.</p>
            <me><xsl:value-of select="vectorequation"/></me>
        <ol>
            <li> Write a system of scalar equations corresponding to this vector equation. </li>
            <li> Write an augmented matrix corresponding to this vector equation. </li>
        </ol>
      </xsl:otherwise>
    </xsl:choose>
  </statement>

  <answer>
    <xsl:choose>
      <xsl:when test="prompt='system'">
        <ol>
            <li><me><xsl:value-of select="matrix"/></me> </li>
            <li>
                <me><xsl:value-of select="vectorequation"/></me>
            </li>
        </ol>
      </xsl:when>
      <xsl:when test="prompt='matrix'">
          <ol>
            <li>
                <me><xsl:value-of select="system"/></me>
            </li>
            <li>
                <me><xsl:value-of select="vectorequation"/></me>
            </li>
        </ol>
      </xsl:when>
      <xsl:otherwise>
        <ol>
            <li>
                <me><xsl:value-of select="system"/></me>
            </li>
            <li><me><xsl:value-of select="matrix"/></me> </li>
        </ol>
      </xsl:otherwise>
    </xsl:choose>
  </answer>
</exercise>