E1.ptx

<exercise>
  <statement>
    <xsl:choose>
      <xsl:when test="prompt='system'">
        <p> Consider the system of equations
            <md alignment="alignat">
                <xsl:attribute name="alignat-columns"><xsl:value-of select="alignCols"/></xsl:attribute>
              <xsl:for-each select="system/*">
                <mrow><xsl:value-of select="."/></mrow>
              </xsl:for-each>
            </md></p>
        <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>        
             <md alignment="alignat">
                <xsl:attribute name="alignat-columns"><xsl:value-of select="alignCols"/></xsl:attribute>
              <xsl:for-each select="system/*">
                <mrow><xsl:value-of select="."/></mrow>
              </xsl:for-each>
            </md> 
            </li>
            <li>                
                <me><xsl:value-of select="vectorequation"/></me>
            </li>
        </ol>
      </xsl:when>
      <xsl:otherwise>
        <ol>
            <li>        
                <md alignment="alignat">
                    <xsl:attribute name="alignat-columns"><xsl:value-of select="alignCols"/></xsl:attribute>
                  <xsl:for-each select="system/*">
                    <mrow><xsl:value-of select="."/></mrow>
                  </xsl:for-each>
                </md>
            </li>
            <li><me><xsl:value-of select="matrix"/></me> </li>
        </ol>
      </xsl:otherwise>
    </xsl:choose>
  </answer>
</exercise>