Question 1121369
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How do you want it done?  Substitution?  Cramer's Rule?  Gauss-Jordan?


I'm not going to do it all three ways, and besides, you need to learn to follow instructions.  For example, the instructions on the page where you submitted your problem that say to ask a complete question, to explain what it is about the problem that is giving you difficulty, and to show the work you have done so far.
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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