Question 583090
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You can use Gauss-Jordan Row Reduction:


<a href="http://people.hofstra.edu/stefan_waner/tutorialsf1/unit2_3.html">Gauss-Jordan Row Reduction Tutorial</a>


Or you can calculate the determinants and use Cramer's Rule:


<a href="http://www.purplemath.com/modules/determs.htm">Determinants Page 1</a>


<a href="http://www.purplemath.com/modules/determs2.htm">Determinants Page 2</a>


<a href="http://www.purplemath.com/modules/cramers.htm">Cramer's Rule</a>


As for graphing, just take each of the equations and graph it as you ordinarily would -- just do it on the same set of coordinate axes.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
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