Question 254047
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*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x\ +\ y\ +\ z\ =\ 7400]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ x\ +\ y\ =\ 4700\ \Rightarrow\ \ x\ =\ 4700\ -\ y]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y\ +\ z\ =\ 5200\ \Rightarrow\ \ z\ =\ 5200\ -\ y]


Substitute:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 4700\ -\ y\ +\ y\ +\ 5200\ -\ y\ =\ 7400]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ -y\ =\ -2500]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ y\ =\ 2500]


You should be able to figure the other two from here.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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