<PRE><B>Question 322767</B>
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&quot;substition&quot; What does that mean?  I know how to solve a system of linear equations by &lt;i&gt;substi&lt;b&gt;tu&lt;/b&gt;tion&lt;/i&gt;.  Is that what you want?



John
*[tex \LARGE e^{i\pi} + 1 = 0]
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