Question 1031999
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If an ordered pair is an element of the solution set of an equation in two variables, substituting the coordinates of the ordered pair for the respective variables in the equation will result in a true statement.  So if you have an ordered pair with one coordinate that is known and one that is unknown, substitute the known value and solve the equation for the unknown value.


By the way, be careful with your capitalization:  x and X are NOT, under any circumstances, the same thing.


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

*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  

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