Question 604503
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Addition method:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 4x\ -\ 5y\ =\ 26]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 3x\ +\ 6y\ =\ 0]


Change the name of the method.  Elimination Method is more descriptive of the process.


Multiply the first equation by 3 and the second equation by -4


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 12x\ -\ 15y\ =\ 78]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -12x\ -\ 24y\ =\ 0]


Add the two equations, eliminating the *[tex \LARGE x] variable (hence the name)


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -39y\ =\ 78]


Solve for *[tex \LARGE y] and then substitute back into either original equation to solve for *[tex \LARGE x]


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